Merge remote-tracking branch 'origin/master' into 1.8

Source/Editor/Content/GUI/ContentNavigation.cs

@@ -161,7 +161,7 @@ namespace FlaxEditor.Content.GUI
         {
             var style = Style.Current;
             var rect = new Rectangle(Float2.Zero, Size);
-            var color = IsDragOver ? style.BackgroundSelected * 0.6f : (_mouseDown ? style.BackgroundSelected : (IsMouseOver ? style.BackgroundHighlighted : Color.Transparent));
+            var color = IsDragOver ? Color.Transparent : (_mouseDown ? style.BackgroundSelected : (IsMouseOver ? style.BackgroundHighlighted : Color.Transparent));
             Render2D.FillRectangle(rect, color);
             Render2D.DrawSprite(Editor.Instance.Icons.ArrowRight12, new Rectangle(rect.Location.X, rect.Y + rect.Size.Y * 0.25f, rect.Size.X, rect.Size.X), EnabledInHierarchy ? style.Foreground : style.ForegroundDisabled);
         }

Source/Editor/Content/GUI/ContentView.DragDrop.cs

@@ -1,123 +0,0 @@
-// Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
-
-using FlaxEditor.GUI.Drag;
-using FlaxEditor.SceneGraph;
-using FlaxEngine;
-using FlaxEngine.GUI;
-
-namespace FlaxEditor.Content.GUI
-{
-    public partial class ContentView
-    {
-        private bool _validDragOver;
-        private DragActors _dragActors;
-
-        /// <inheritdoc />
-        public override DragDropEffect OnDragEnter(ref Float2 location, DragData data)
-        {
-            var result = base.OnDragEnter(ref location, data);
-            if (result != DragDropEffect.None)
-                return result;
-
-            // Check if drop file(s)
-            if (data is DragDataFiles)
-            {
-                _validDragOver = true;
-                return DragDropEffect.Copy;
-            }
-
-            // Check if drop actor(s)
-            if (_dragActors == null)
-                _dragActors = new DragActors(ValidateDragActors);
-            if (_dragActors.OnDragEnter(data))
-            {
-                _validDragOver = true;
-                return DragDropEffect.Move;
-            }
-
-            return DragDropEffect.None;
-        }
-
-        private bool ValidateDragActors(ActorNode actor)
-        {
-            return actor.CanCreatePrefab && Editor.Instance.Windows.ContentWin.CurrentViewFolder.CanHaveAssets;
-        }
-
-        private void ImportActors(DragActors actors, ContentFolder location)
-        {
-            foreach (var actorNode in actors.Objects)
-            {
-                var actor = actorNode.Actor;
-                if (actors.Objects.Contains(actorNode.ParentNode as ActorNode))
-                    continue;
-
-                Editor.Instance.Prefabs.CreatePrefab(actor, false);
-            }
-        }
-
-        /// <inheritdoc />
-        public override DragDropEffect OnDragMove(ref Float2 location, DragData data)
-        {
-            _validDragOver = false;
-            var result = base.OnDragMove(ref location, data);
-            if (result != DragDropEffect.None)
-                return result;
-
-            if (data is DragDataFiles)
-            {
-                _validDragOver = true;
-                result = DragDropEffect.Copy;
-            }
-            else if (_dragActors != null && _dragActors.HasValidDrag)
-            {
-                _validDragOver = true;
-                result = DragDropEffect.Move;
-            }
-
-            return result;
-        }
-
-        /// <inheritdoc />
-        public override DragDropEffect OnDragDrop(ref Float2 location, DragData data)
-        {
-            var result = base.OnDragDrop(ref location, data);
-            if (result != DragDropEffect.None)
-                return result;
-
-            // Check if drop file(s)
-            if (data is DragDataFiles files)
-            {
-                // Import files
-                var currentFolder = Editor.Instance.Windows.ContentWin.CurrentViewFolder;
-                if (currentFolder != null)
-                    Editor.Instance.ContentImporting.Import(files.Files, currentFolder);
-                result = DragDropEffect.Copy;
-            }
-            // Check if drop actor(s)
-            else if (_dragActors != null && _dragActors.HasValidDrag)
-            {
-                // Import actors
-                var currentFolder = Editor.Instance.Windows.ContentWin.CurrentViewFolder;
-                if (currentFolder != null)
-                    ImportActors(_dragActors, currentFolder);
-
-                _dragActors.OnDragDrop();
-                result = DragDropEffect.Move;
-            }
-
-            // Clear cache
-            _validDragOver = false;
-
-            return result;
-        }
-
-        /// <inheritdoc />
-        public override void OnDragLeave()
-        {
-            _validDragOver = false;
-            _dragActors?.OnDragLeave();
-
-            base.OnDragLeave();
-        }
-    }
-}

Source/Editor/Content/GUI/ContentView.cs

@@ -3,7 +3,9 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using FlaxEditor.GUI.Drag;
 using FlaxEditor.Options;
+using FlaxEditor.SceneGraph;
 using FlaxEditor.Windows;
 using FlaxEngine;
 using FlaxEngine.GUI;
@@ -52,14 +54,17 @@ namespace FlaxEditor.Content.GUI
     public partial class ContentView : ContainerControl, IContentItemOwner
     {
         private readonly List<ContentItem> _items = new List<ContentItem>(256);
-        private readonly List<ContentItem> _selection = new List<ContentItem>(16);
+        private readonly List<ContentItem> _selection = new List<ContentItem>();
 
         private float _viewScale = 1.0f;
         private ContentViewType _viewType = ContentViewType.Tiles;
-        private bool _isRubberBandSpanning = false;
+        private bool _isRubberBandSpanning;
-        private Float2 _mousePresslocation;
+        private Float2 _mousePressLocation;
         private Rectangle _rubberBandRectangle;
 
+        private bool _validDragOver;
+        private DragActors _dragActors;
+
         #region External Events
 
         /// <summary>
@@ -193,6 +198,7 @@ namespace FlaxEditor.Content.GUI
                         OnDelete?.Invoke(_selection);
                 }),
                 new InputActionsContainer.Binding(options => options.SelectAll, SelectAll),
+                new InputActionsContainer.Binding(options => options.DeselectAll, DeselectAll),
                 new InputActionsContainer.Binding(options => options.Rename, () =>
                 {
                     if (HasSelection && _selection[0].CanRename)
@@ -397,10 +403,7 @@ namespace FlaxEditor.Content.GUI
             PerformLayout();
         }
 
-        /// <summary>
+        private void BulkSelectUpdate(bool select = true)
-        /// Selects all the items.
-        /// </summary>
-        public void SelectAll()
         {
             // Lock layout
             var wasLayoutLocked = IsLayoutLocked;
@@ -408,13 +411,30 @@ namespace FlaxEditor.Content.GUI
 
             // Select items
             _selection.Clear();
-            _selection.AddRange(_items);
+            if (select)
+                _selection.AddRange(_items);
 
             // Unload and perform UI layout
             IsLayoutLocked = wasLayoutLocked;
             PerformLayout();
         }
 
+        /// <summary>
+        /// Selects all the items.
+        /// </summary>
+        public void SelectAll()
+        {
+            BulkSelectUpdate(true);
+        }
+
+        /// <summary>
+        /// Deselects all the items.
+        /// </summary>
+        public void DeselectAll()
+        {
+            BulkSelectUpdate(false);
+        }
+
         /// <summary>
         /// Deselects the specified item.
         /// </summary>
@@ -595,7 +615,9 @@ namespace FlaxEditor.Content.GUI
             // Check if drag is over
             if (IsDragOver && _validDragOver)
             {
-                Render2D.FillRectangle(new Rectangle(Float2.Zero, Size), style.BackgroundSelected * 0.4f);
+                var bounds = new Rectangle(Float2.One, Size - Float2.One * 2);
+                Render2D.FillRectangle(bounds, style.Selection);
+                Render2D.DrawRectangle(bounds, style.SelectionBorder);
             }
 
             // Check if it's an empty thing
@@ -604,10 +626,11 @@ namespace FlaxEditor.Content.GUI
                 Render2D.DrawText(style.FontSmall, IsSearching ? "No results" : "Empty", new Rectangle(Float2.Zero, Size), style.ForegroundDisabled, TextAlignment.Center, TextAlignment.Center);
             }
 
+            // Selection
             if (_isRubberBandSpanning)
             {
-                Render2D.FillRectangle(_rubberBandRectangle, Color.Orange * 0.4f);
+                Render2D.FillRectangle(_rubberBandRectangle, style.Selection);
-                Render2D.DrawRectangle(_rubberBandRectangle, Color.Orange);
+                Render2D.DrawRectangle(_rubberBandRectangle, style.SelectionBorder);
             }
         }
 
@@ -619,8 +642,8 @@ namespace FlaxEditor.Content.GUI
 
             if (button == MouseButton.Left)
             {
-                _mousePresslocation = location;
+                _mousePressLocation = location;
-                _rubberBandRectangle = new Rectangle(_mousePresslocation, 0, 0);
+                _rubberBandRectangle = new Rectangle(_mousePressLocation, 0, 0);
                 _isRubberBandSpanning = true;
                 StartMouseCapture();
             }
@@ -632,8 +655,8 @@ namespace FlaxEditor.Content.GUI
         {
             if (_isRubberBandSpanning)
             {
-                _rubberBandRectangle.Width = location.X - _mousePresslocation.X;
+                _rubberBandRectangle.Width = location.X - _mousePressLocation.X;
-                _rubberBandRectangle.Height = location.Y - _mousePresslocation.Y;
+                _rubberBandRectangle.Height = location.Y - _mousePressLocation.Y;
             }
 
             base.OnMouseMove(location);
@@ -768,6 +791,114 @@ namespace FlaxEditor.Content.GUI
             return false;
         }
 
+        /// <inheritdoc />
+        public override DragDropEffect OnDragEnter(ref Float2 location, DragData data)
+        {
+            var result = base.OnDragEnter(ref location, data);
+            if (result != DragDropEffect.None)
+                return result;
+
+            // Check if drop file(s)
+            if (data is DragDataFiles)
+            {
+                _validDragOver = true;
+                return DragDropEffect.Copy;
+            }
+
+            // Check if drop actor(s)
+            if (_dragActors == null)
+                _dragActors = new DragActors(ValidateDragActors);
+            if (_dragActors.OnDragEnter(data))
+            {
+                _validDragOver = true;
+                return DragDropEffect.Move;
+            }
+
+            return DragDropEffect.None;
+        }
+
+        private bool ValidateDragActors(ActorNode actor)
+        {
+            return actor.CanCreatePrefab && Editor.Instance.Windows.ContentWin.CurrentViewFolder.CanHaveAssets;
+        }
+
+        private void ImportActors(DragActors actors, ContentFolder location)
+        {
+            foreach (var actorNode in actors.Objects)
+            {
+                var actor = actorNode.Actor;
+                if (actors.Objects.Contains(actorNode.ParentNode as ActorNode))
+                    continue;
+
+                Editor.Instance.Prefabs.CreatePrefab(actor, false);
+            }
+        }
+
+        /// <inheritdoc />
+        public override DragDropEffect OnDragMove(ref Float2 location, DragData data)
+        {
+            _validDragOver = false;
+            var result = base.OnDragMove(ref location, data);
+            if (result != DragDropEffect.None)
+                return result;
+
+            if (data is DragDataFiles)
+            {
+                _validDragOver = true;
+                result = DragDropEffect.Copy;
+            }
+            else if (_dragActors != null && _dragActors.HasValidDrag)
+            {
+                _validDragOver = true;
+                result = DragDropEffect.Move;
+            }
+
+            return result;
+        }
+
+        /// <inheritdoc />
+        public override DragDropEffect OnDragDrop(ref Float2 location, DragData data)
+        {
+            var result = base.OnDragDrop(ref location, data);
+            if (result != DragDropEffect.None)
+                return result;
+
+            // Check if drop file(s)
+            if (data is DragDataFiles files)
+            {
+                // Import files
+                var currentFolder = Editor.Instance.Windows.ContentWin.CurrentViewFolder;
+                if (currentFolder != null)
+                    Editor.Instance.ContentImporting.Import(files.Files, currentFolder);
+                result = DragDropEffect.Copy;
+            }
+            // Check if drop actor(s)
+            else if (_dragActors != null && _dragActors.HasValidDrag)
+            {
+                // Import actors
+                var currentFolder = Editor.Instance.Windows.ContentWin.CurrentViewFolder;
+                if (currentFolder != null)
+                    ImportActors(_dragActors, currentFolder);
+
+                _dragActors.OnDragDrop();
+                result = DragDropEffect.Move;
+            }
+
+            // Clear cache
+            _validDragOver = false;
+
+            return result;
+        }
+
+        /// <inheritdoc />
+        public override void OnDragLeave()
+        {
+            _validDragOver = false;
+            _dragActors?.OnDragLeave();
+
+            base.OnDragLeave();
+        }
+
         /// <inheritdoc />
         protected override void PerformLayoutBeforeChildren()
         {
@@ -833,6 +964,9 @@ namespace FlaxEditor.Content.GUI
         /// <inheritdoc />
         public override void OnDestroy()
         {
+            if (IsDisposing)
+                return;
+
             // Ensure to unlink all items
             ClearItems();
 

Source/Editor/Content/Items/ContentFolder.cs

@@ -241,7 +241,12 @@ namespace FlaxEditor.Content
 
             // Check if drag is over
             if (IsDragOver && _validDragOver)
-                Render2D.FillRectangle(new Rectangle(Float2.Zero, Size), Style.Current.BackgroundSelected * 0.6f);
+            {
+                var style = Style.Current;
+                var bounds = new Rectangle(Float2.Zero, Size);
+                Render2D.FillRectangle(bounds, style.Selection);
+                Render2D.DrawRectangle(bounds, style.SelectionBorder);
+            }
         }
 
         private bool ValidateDragItem(ContentItem item)

Source/Editor/Content/Proxy/PrefabProxy.cs

@@ -75,6 +75,8 @@ namespace FlaxEditor.Content
         /// <inheritdoc />
         public override void Create(string outputPath, object arg)
         {
+            bool resetTransform = false;
+            var transform = Transform.Identity;
             if (!(arg is Actor actor))
             {
                 // Create default prefab root object
@@ -86,8 +88,17 @@ namespace FlaxEditor.Content
                 // Cleanup it after usage
                 Object.Destroy(actor, 20.0f);
             }
+            else if (actor.Scene != null)
+            {
+                // Create prefab with identity transform so the actor instance on a level will have it customized
+                resetTransform = true;
+                transform = actor.LocalTransform;
+                actor.LocalTransform = Transform.Identity;
+            }
 
             PrefabManager.CreatePrefab(actor, outputPath, true);
+            if (resetTransform)
+                actor.LocalTransform = transform;
         }
 
         /// <inheritdoc />

Source/Editor/CustomEditors/CustomEditor.cs

@@ -747,7 +747,7 @@ namespace FlaxEditor.CustomEditors
         /// </summary>
         public void SetValueToDefault()
         {
-            SetValueCloned(Values.DefaultValue);
+            SetValue(Utilities.Utils.CloneValue(Values.DefaultValue));
         }
 
         /// <summary>
@@ -784,19 +784,7 @@ namespace FlaxEditor.CustomEditors
                 return;
             }
 
-            SetValueCloned(Values.ReferenceValue);
+            SetValue(Utilities.Utils.CloneValue(Values.ReferenceValue));
-        }
-
-        private void SetValueCloned(object value)
-        {
-            // For objects (eg. arrays) we need to clone them to prevent editing default/reference value within editor
-            if (value != null && !value.GetType().IsValueType)
-            {
-                var json = JsonSerializer.Serialize(value);
-                value = JsonSerializer.Deserialize(json, value.GetType());
-            }
-
-            SetValue(value);
         }
 
         /// <summary>

Source/Editor/CustomEditors/Dedicated/ActorEditor.cs

@@ -245,9 +245,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
         {
             // Special case for new Script added to actor
             if (editor.Values[0] is Script script && !script.HasPrefabLink)
-            {
                 return CreateDiffNode(editor);
-            }
 
             // Skip if no change detected
             var isRefEdited = editor.Values.IsReferenceValueModified;
@@ -258,9 +256,16 @@ namespace FlaxEditor.CustomEditors.Dedicated
             if (editor.ChildrenEditors.Count == 0 || (isRefEdited && editor is CollectionEditor))
                 result = CreateDiffNode(editor);
             bool isScriptEditorWithRefValue = editor is ScriptsEditor && editor.Values.HasReferenceValue;
+            bool isActorEditorInLevel = editor is ActorEditor && editor.Values[0] is Actor actor && actor.IsPrefabRoot && actor.Scene != null;
             for (int i = 0; i < editor.ChildrenEditors.Count; i++)
             {
-                var child = ProcessDiff(editor.ChildrenEditors[i], !isScriptEditorWithRefValue);
+                var childEditor = editor.ChildrenEditors[i];
+
+                // Special case for root actor transformation (can be applied only in Prefab editor, not in Level)
+                if (isActorEditorInLevel && childEditor.Values.Info.Name is "LocalPosition" or "LocalOrientation" or "LocalScale")
+                    continue;
+
+                var child = ProcessDiff(childEditor, !isScriptEditorWithRefValue);
                 if (child != null)
                 {
                     if (result == null)
@@ -276,7 +281,6 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 {
                     var prefabObjectScript = prefabObjectScripts[j];
                     bool isRemoved = true;
-
                     for (int i = 0; i < editor.ChildrenEditors.Count; i++)
                     {
                         if (editor.ChildrenEditors[i].Values is ScriptsEditor.ScriptsContainer container && container.PrefabObjectId == prefabObjectScript.PrefabObjectID)
@@ -286,14 +290,12 @@ namespace FlaxEditor.CustomEditors.Dedicated
                             break;
                         }
                     }
-
                     if (isRemoved)
                     {
                         var dummy = new RemovedScriptDummy
                         {
                             PrefabObject = prefabObjectScript
                         };
-
                         var child = CreateDiffNode(dummy);
                         if (result == null)
                             result = CreateDiffNode(editor);

Source/Editor/CustomEditors/Dedicated/MissingScriptEditor.cs

@@ -67,25 +67,6 @@ public class MissingScriptEditor : GenericEditor
         base.Initialize(layout);
     }
 
-    private void FindActorsWithMatchingMissingScript(List<MissingScript> missingScripts)
-    {
-        foreach (Actor actor in Level.GetActors(typeof(Actor)))
-        {
-            for (int scriptIndex = 0; scriptIndex < actor.ScriptsCount; scriptIndex++)
-            {
-                Script actorScript = actor.Scripts[scriptIndex];
-                if (actorScript is not MissingScript missingActorScript)
-                    continue;
-
-                MissingScript currentMissing = Values[0] as MissingScript;
-                if (missingActorScript.MissingTypeName != currentMissing.MissingTypeName)
-                    continue;
-
-                missingScripts.Add(missingActorScript);
-            }
-        }
-    }
-
     private void RunReplacementMultiCast(List<IUndoAction> actions)
     {
         if (actions.Count == 0)
@@ -104,16 +85,54 @@ public class MissingScriptEditor : GenericEditor
         }
     }
 
-    private void ReplaceScript(ScriptType script, bool replaceAllInScene)
+    private void GetMissingScripts(Actor actor, string currentMissingTypeName, List<MissingScript> missingScripts)
     {
-        var actions = new List<IUndoAction>(4);
+        // Iterate over the scripts of this actor
+        for (int i = 0; i < actor.ScriptsCount; i++)
+        {
+            if (actor.GetScript(i) is MissingScript otherMissing &&
+                otherMissing.MissingTypeName == currentMissingTypeName)
+            {
+                missingScripts.Add(otherMissing);
+            }
+        }
 
+        // Iterate over this actor children (recursive)
+        for (int i = 0; i < actor.ChildrenCount; i++)
+        {
+            GetMissingScripts(actor.GetChild(i), currentMissingTypeName, missingScripts);
+        }
+    }
+
+    private void ReplaceScript(ScriptType script)
+    {
         var missingScripts = new List<MissingScript>();
-        if (!replaceAllInScene)
+        var currentMissing = (MissingScript)Values[0];
-            missingScripts.Add((MissingScript)Values[0]);
+        var currentMissingTypeName = currentMissing.MissingTypeName;
+        if (_shouldReplaceAllCheckbox.Checked)
+        {
+            if (currentMissing.Scene == null && currentMissing.Actor != null)
+            {
+                // Find all missing scripts in prefab instance
+                GetMissingScripts(currentMissing.Actor.GetPrefabRoot(), currentMissingTypeName, missingScripts);
+            }
+            else
+            {
+                // Find all missing scripts in all loaded levels that match this type
+                for (int i = 0; i < Level.ScenesCount; i++)
+                {
+                    GetMissingScripts(Level.GetScene(i), currentMissingTypeName, missingScripts);
+                }
+            }
+        }
         else
-            FindActorsWithMatchingMissingScript(missingScripts);
+        {
+            // Use the current instance only
+            foreach (var value in Values)
+                missingScripts.Add((MissingScript)value);
+        }
 
+        var actions = new List<IUndoAction>(4);
         foreach (var missingScript in missingScripts)
             actions.Add(AddRemoveScript.Add(missingScript.Actor, script));
         RunReplacementMultiCast(actions);
@@ -149,7 +168,7 @@ public class MissingScriptEditor : GenericEditor
         var cm = new ItemsListContextMenu(180);
         for (int i = 0; i < scripts.Count; i++)
             cm.AddItem(new TypeSearchPopup.TypeItemView(scripts[i]));
-        cm.ItemClicked += item => ReplaceScript((ScriptType)item.Tag, _shouldReplaceAllCheckbox.Checked);
+        cm.ItemClicked += item => ReplaceScript((ScriptType)item.Tag);
         cm.SortItems();
         cm.Show(_dropPanel, _replaceScriptButton.BottomLeft - new Float2((cm.Width - _replaceScriptButton.Width) / 2, 0));
     }

Source/Editor/CustomEditors/Dedicated/RagdollEditor.cs

@@ -160,7 +160,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
             var actions = new List<IUndoAction>();
             foreach (var body in bodies)
             {
-                var action = new Actions.DeleteActorsAction(new List<SceneGraphNode> { SceneGraphFactory.FindNode(body.ID) });
+                var action = new Actions.DeleteActorsAction(body);
                 action.Do();
                 actions.Add(action);
             }
@@ -185,7 +185,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
             var body = bodies.FirstOrDefault(x => x.Name == name);
             if (body != null)
             {
-                var action = new Actions.DeleteActorsAction(new List<SceneGraphNode> { SceneGraphFactory.FindNode(body.ID) });
+                var action = new Actions.DeleteActorsAction(body);
                 action.Do();
                 Presenter.Undo?.AddAction(action);
             }
@@ -224,7 +224,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
                     else
                     {
                         // Remove joint that will no longer be valid
-                        var action = new Actions.DeleteActorsAction(new List<SceneGraphNode> { SceneGraphFactory.FindNode(joint.ID) });
+                        var action = new Actions.DeleteActorsAction(joint);
                         action.Do();
                         Presenter.Undo?.AddAction(action);
                     }
@@ -233,7 +233,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
 
             // Remove body
             {
-                var action = new Actions.DeleteActorsAction(new List<SceneGraphNode> { SceneGraphFactory.FindNode(body.ID) });
+                var action = new Actions.DeleteActorsAction(body);
                 action.Do();
                 Presenter.Undo?.AddAction(action);
             }

Source/Editor/CustomEditors/Dedicated/ScriptsEditor.cs

@@ -151,8 +151,8 @@ namespace FlaxEditor.CustomEditors.Dedicated
             if (IsDragOver && _dragHandlers != null && _dragHandlers.HasValidDrag)
             {
                 var area = new Rectangle(Float2.Zero, size);
-                Render2D.FillRectangle(area, Color.Orange * 0.5f);
+                Render2D.FillRectangle(area, style.Selection);
-                Render2D.DrawRectangle(area, Color.Black);
+                Render2D.DrawRectangle(area, style.SelectionBorder);
             }
 
             base.Draw();
@@ -520,7 +520,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
         {
             base.Draw();
 
-            var color = FlaxEngine.GUI.Style.Current.BackgroundSelected * (IsDragOver ? 0.9f : 0.1f);
+            var color = Style.Current.BackgroundSelected * (IsDragOver ? 0.9f : 0.1f);
             Render2D.FillRectangle(new Rectangle(Float2.Zero, Size), color);
         }
 

Source/Editor/CustomEditors/Dedicated/UIControlEditor.cs

@@ -589,25 +589,27 @@ namespace FlaxEditor.CustomEditors.Dedicated
             LayoutElementsContainer yEl;
             LayoutElementsContainer hEl;
             LayoutElementsContainer vEl;
+            Color axisColorX = ActorTransformEditor.AxisColorX;
+            Color axisColorY = ActorTransformEditor.AxisColorY;
             if (xEq)
             {
-                xEl = UniformPanelCapsuleForObjectWithText(horUp, "X: ", xItem.GetValues(Values));
+                xEl = UniformPanelCapsuleForObjectWithText(horUp, "X: ", xItem.GetValues(Values), axisColorX);
-                vEl = UniformPanelCapsuleForObjectWithText(horDown, "Width: ", widthItem.GetValues(Values));
+                vEl = UniformPanelCapsuleForObjectWithText(horDown, "Width: ", widthItem.GetValues(Values), axisColorX);
             }
             else
             {
-                xEl = UniformPanelCapsuleForObjectWithText(horUp, "Left: ", leftItem.GetValues(Values));
+                xEl = UniformPanelCapsuleForObjectWithText(horUp, "Left: ", leftItem.GetValues(Values), axisColorX);
-                vEl = UniformPanelCapsuleForObjectWithText(horDown, "Right: ", rightItem.GetValues(Values));
+                vEl = UniformPanelCapsuleForObjectWithText(horDown, "Right: ", rightItem.GetValues(Values), axisColorX);
             }
             if (yEq)
             {
-                yEl = UniformPanelCapsuleForObjectWithText(horUp, "Y: ", yItem.GetValues(Values));
+                yEl = UniformPanelCapsuleForObjectWithText(horUp, "Y: ", yItem.GetValues(Values), axisColorY);
-                hEl = UniformPanelCapsuleForObjectWithText(horDown, "Height: ", heightItem.GetValues(Values));
+                hEl = UniformPanelCapsuleForObjectWithText(horDown, "Height: ", heightItem.GetValues(Values), axisColorY);
             }
             else
             {
-                yEl = UniformPanelCapsuleForObjectWithText(horUp, "Top: ", topItem.GetValues(Values));
+                yEl = UniformPanelCapsuleForObjectWithText(horUp, "Top: ", topItem.GetValues(Values), axisColorY);
-                hEl = UniformPanelCapsuleForObjectWithText(horDown, "Bottom: ", bottomItem.GetValues(Values));
+                hEl = UniformPanelCapsuleForObjectWithText(horDown, "Bottom: ", bottomItem.GetValues(Values), axisColorY);
             }
             xEl.Control.AnchorMin = new Float2(0, xEl.Control.AnchorMin.Y);
             xEl.Control.AnchorMax = new Float2(0.5f, xEl.Control.AnchorMax.Y);
@@ -624,28 +626,34 @@ namespace FlaxEditor.CustomEditors.Dedicated
 
         private VerticalPanelElement VerticalPanelWithoutMargin(LayoutElementsContainer cont)
         {
-            var horUp = cont.VerticalPanel();
+            var panel = cont.VerticalPanel();
-            horUp.Panel.Margin = Margin.Zero;
+            panel.Panel.Margin = Margin.Zero;
-            return horUp;
+            return panel;
         }
 
         private CustomElementsContainer<UniformGridPanel> UniformGridTwoByOne(LayoutElementsContainer cont)
         {
-            var horUp = cont.CustomContainer<UniformGridPanel>();
+            var grid = cont.CustomContainer<UniformGridPanel>();
-            horUp.CustomControl.SlotsHorizontally = 2;
+            grid.CustomControl.SlotsHorizontally = 2;
-            horUp.CustomControl.SlotsVertically = 1;
+            grid.CustomControl.SlotsVertically = 1;
-            horUp.CustomControl.SlotPadding = Margin.Zero;
+            grid.CustomControl.SlotPadding = Margin.Zero;
-            horUp.CustomControl.ClipChildren = false;
+            grid.CustomControl.ClipChildren = false;
-            return horUp;
+            return grid;
         }
 
-        private CustomElementsContainer<UniformGridPanel> UniformPanelCapsuleForObjectWithText(LayoutElementsContainer el, string text, ValueContainer values)
+        private CustomElementsContainer<UniformGridPanel> UniformPanelCapsuleForObjectWithText(LayoutElementsContainer el, string text, ValueContainer values, Color borderColor)
         {
-            CustomElementsContainer<UniformGridPanel> hor = UniformGridTwoByOne(el);
+            var grid = UniformGridTwoByOne(el);
-            hor.CustomControl.SlotPadding = new Margin(5, 5, 0, 0);
+            grid.CustomControl.SlotPadding = new Margin(5, 5, 1, 1);
-            LabelElement lab = hor.Label(text);
+            var label = grid.Label(text);
-            hor.Object(values);
+            var editor = grid.Object(values);
-            return hor;
+            if (editor is FloatEditor floatEditor && floatEditor.Element is FloatValueElement floatEditorElement)
+            {
+                var back = FlaxEngine.GUI.Style.Current.TextBoxBackground;
+                floatEditorElement.ValueBox.BorderColor = Color.Lerp(borderColor, back, ActorTransformEditor.AxisGreyOutFactor);
+                floatEditorElement.ValueBox.BorderSelectedColor = borderColor;
+            }
+            return grid;
         }
 
         private bool _cachedXEq;

Source/Editor/CustomEditors/Editors/ActorTransformEditor.cs

@@ -26,6 +26,11 @@ namespace FlaxEditor.CustomEditors.Editors
         /// </summary>
         public static Color AxisColorZ = new Color(0.0f, 0.0235294f, 1.0f, 1.0f);
 
+        /// <summary>
+        /// The axes colors grey out scale when input field is not focused.
+        /// </summary>
+        public static float AxisGreyOutFactor = 0.6f;
+
         /// <summary>
         /// Custom editor for actor position property.
         /// </summary>
@@ -39,12 +44,11 @@ namespace FlaxEditor.CustomEditors.Editors
 
                 // Override colors
                 var back = FlaxEngine.GUI.Style.Current.TextBoxBackground;
-                var grayOutFactor = 0.6f;
+                XElement.ValueBox.BorderColor = Color.Lerp(AxisColorX, back, AxisGreyOutFactor);
-                XElement.ValueBox.BorderColor = Color.Lerp(AxisColorX, back, grayOutFactor);
                 XElement.ValueBox.BorderSelectedColor = AxisColorX;
-                YElement.ValueBox.BorderColor = Color.Lerp(AxisColorY, back, grayOutFactor);
+                YElement.ValueBox.BorderColor = Color.Lerp(AxisColorY, back, AxisGreyOutFactor);
                 YElement.ValueBox.BorderSelectedColor = AxisColorY;
-                ZElement.ValueBox.BorderColor = Color.Lerp(AxisColorZ, back, grayOutFactor);
+                ZElement.ValueBox.BorderColor = Color.Lerp(AxisColorZ, back, AxisGreyOutFactor);
                 ZElement.ValueBox.BorderSelectedColor = AxisColorZ;
             }
         }
@@ -62,12 +66,11 @@ namespace FlaxEditor.CustomEditors.Editors
 
                 // Override colors
                 var back = FlaxEngine.GUI.Style.Current.TextBoxBackground;
-                var grayOutFactor = 0.6f;
+                XElement.ValueBox.BorderColor = Color.Lerp(AxisColorX, back, AxisGreyOutFactor);
-                XElement.ValueBox.BorderColor = Color.Lerp(AxisColorX, back, grayOutFactor);
                 XElement.ValueBox.BorderSelectedColor = AxisColorX;
-                YElement.ValueBox.BorderColor = Color.Lerp(AxisColorY, back, grayOutFactor);
+                YElement.ValueBox.BorderColor = Color.Lerp(AxisColorY, back, AxisGreyOutFactor);
                 YElement.ValueBox.BorderSelectedColor = AxisColorY;
-                ZElement.ValueBox.BorderColor = Color.Lerp(AxisColorZ, back, grayOutFactor);
+                ZElement.ValueBox.BorderColor = Color.Lerp(AxisColorZ, back, AxisGreyOutFactor);
                 ZElement.ValueBox.BorderSelectedColor = AxisColorZ;
             }
         }

Source/Editor/CustomEditors/Editors/ArrayEditor.cs

@@ -2,7 +2,6 @@
 
 using System;
 using System.Collections;
-using FlaxEditor.Scripting;
 using FlaxEngine;
 using FlaxEngine.Utilities;
 
@@ -47,8 +46,9 @@ namespace FlaxEditor.CustomEditors.Editors
                     if (elementType.IsValueType || NotNullItems)
                     {
                         // Fill new entries with the last value
+                        var lastValue = array.GetValue(oldSize - 1);
                         for (int i = oldSize; i < newSize; i++)
-                            Array.Copy(array, oldSize - 1, newValues, i, 1);
+                            newValues.SetValue(Utilities.Utils.CloneValue(lastValue), i);
                     }
                     else
                     {

Source/Editor/CustomEditors/Editors/CollectionEditor.cs

@@ -542,9 +542,10 @@ namespace FlaxEditor.CustomEditors.Editors
             {
                 if (_dragHandlers is { HasValidDrag: true })
                 {
+                    var style = FlaxEngine.GUI.Style.Current;
                     var area = new Rectangle(Float2.Zero, Size);
-                    Render2D.FillRectangle(area, Color.Orange * 0.5f);
+                    Render2D.FillRectangle(area, style.Selection);
-                    Render2D.DrawRectangle(area, Color.Black);
+                    Render2D.DrawRectangle(area, style.SelectionBorder);
                 }
 
                 base.Draw();

Source/Editor/CustomEditors/Editors/FlaxObjectRefEditor.cs

@@ -220,7 +220,11 @@ namespace FlaxEditor.CustomEditors.Editors
 
             // Check if drag is over
             if (IsDragOver && _hasValidDragOver)
-                Render2D.FillRectangle(new Rectangle(Float2.Zero, Size), style.BackgroundSelected * 0.4f);
+            {
+                var bounds = new Rectangle(Float2.Zero, Size);
+                Render2D.FillRectangle(bounds, style.Selection);
+                Render2D.DrawRectangle(bounds, style.SelectionBorder);
+            }
         }
 
         /// <inheritdoc />

Source/Editor/CustomEditors/Editors/TypeEditor.cs

@@ -175,7 +175,11 @@ namespace FlaxEditor.CustomEditors.Editors
 
             // Check if drag is over
             if (IsDragOver && _hasValidDragOver)
-                Render2D.FillRectangle(new Rectangle(Float2.Zero, Size), style.BackgroundSelected * 0.4f);
+            {
+                var bounds = new Rectangle(Float2.Zero, Size);
+                Render2D.FillRectangle(bounds, style.Selection);
+                Render2D.DrawRectangle(bounds, style.SelectionBorder);
+            }
         }
 
         /// <inheritdoc />

Source/Editor/Editor.cs

@@ -1676,6 +1676,9 @@ namespace FlaxEditor
         [return: MarshalAs(UnmanagedType.U1)]
         internal static partial bool Internal_CanSetToRoot(IntPtr prefab, IntPtr newRoot);
 
+        [LibraryImport("FlaxEngine", EntryPoint = "EditorInternal_GetPrefabNestedObject", StringMarshalling = StringMarshalling.Custom, StringMarshallingCustomType = typeof(StringMarshaller))]
+        internal static partial void Internal_GetPrefabNestedObject(IntPtr prefabId, IntPtr prefabObjectId, IntPtr outPrefabId, IntPtr outPrefabObjectId);
+
         [LibraryImport("FlaxEngine", EntryPoint = "EditorInternal_GetAnimationTime", StringMarshalling = StringMarshalling.Custom, StringMarshallingCustomType = typeof(StringMarshaller))]
         internal static partial float Internal_GetAnimationTime(IntPtr animatedModel);
 

Source/Editor/GUI/AssetPicker.cs

@@ -182,7 +182,11 @@ namespace FlaxEditor.GUI
 
             // Check if drag is over
             if (IsDragOver && _dragOverElement != null && _dragOverElement.HasValidDrag)
-                Render2D.FillRectangle(iconRect, style.BackgroundSelected * 0.4f);
+            {
+                var bounds = new Rectangle(Float2.Zero, Size);
+                Render2D.FillRectangle(bounds, style.Selection);
+                Render2D.DrawRectangle(bounds, style.SelectionBorder);
+            }
         }
 
         /// <inheritdoc />

Source/Editor/GUI/ContextMenu/ContextMenu.cs

@@ -359,6 +359,17 @@ namespace FlaxEditor.GUI.ContextMenu
             ButtonClicked?.Invoke(button);
         }
 
+        /// <inheritdoc />
+        public override void Show(Control parent, Float2 location)
+        {
+            // Remove last separator to make context menu look better
+            int lastIndex = _panel.Children.Count - 1;
+            if (lastIndex >= 0 && _panel.Children[lastIndex] is ContextMenuSeparator separator)
+                separator.Dispose();
+
+            base.Show(parent, location);
+        }
+
         /// <inheritdoc />
         public override bool ContainsPoint(ref Float2 location, bool precise)
         {

Source/Editor/GUI/ContextMenu/ContextMenuBase.cs

@@ -168,30 +168,30 @@ namespace FlaxEditor.GUI.ContextMenu
             bool isUp = false, isLeft = false;
             if (UseAutomaticDirectionFix)
             {
+                var parentMenu = parent as ContextMenu;
                 if (monitorBounds.Bottom < rightBottomLocationSS.Y)
                 {
-                    // Direction: up
                     isUp = true;
                     locationSS.Y -= dpiSize.Y;
-
+                    if (parentMenu != null && parentMenu._childCM != null)
-                    // Offset to fix sub-menu location
-                    if (parent is ContextMenu menu && menu._childCM != null)
                         locationSS.Y += 30.0f * dpiScale;
                 }
-                if (monitorBounds.Right < rightBottomLocationSS.X || _parentCM?.Direction == ContextMenuDirection.LeftDown || _parentCM?.Direction == ContextMenuDirection.LeftUp)
+                if (parentMenu == null)
                 {
-                    // Direction: left
+                    if (monitorBounds.Right < rightBottomLocationSS.X)
-                    isLeft = true;
-
-                    if (IsSubMenu && _parentCM != null)
-                    {
-                        locationSS.X -= _parentCM.Width + dpiSize.X;
-                    }
-                    else
                     {
+                        isLeft = true;
                         locationSS.X -= dpiSize.X;
                     }
                 }
+                else if (monitorBounds.Right < rightBottomLocationSS.X || _parentCM?.Direction == ContextMenuDirection.LeftDown || _parentCM?.Direction == ContextMenuDirection.LeftUp)
+                {
+                    isLeft = true;
+                    if (IsSubMenu && _parentCM != null)
+                        locationSS.X -= _parentCM.Width + dpiSize.X;
+                    else
+                        locationSS.X -= dpiSize.X;
+                }
             }
 
             // Update direction flag

Source/Editor/GUI/CurveEditor.Contents.cs

@@ -484,6 +484,7 @@ namespace FlaxEditor.GUI
                         cm.AddSeparator();
                         cm.AddButton("Edit all keyframes", () => _editor.EditAllKeyframes(this, location));
                         cm.AddButton("Select all keyframes", _editor.SelectAll);
+                        cm.AddButton("Deselect all keyframes", _editor.DeselectAll);
                         cm.AddButton("Copy all keyframes", () =>
                         {
                             _editor.SelectAll();

Source/Editor/GUI/CurveEditor.cs

@@ -6,6 +6,7 @@ using System.Globalization;
 using System.Linq;
 using FlaxEditor.CustomEditors;
 using FlaxEditor.GUI.ContextMenu;
+using FlaxEditor.Options;
 using FlaxEngine;
 using FlaxEngine.GUI;
 
@@ -713,15 +714,28 @@ namespace FlaxEditor.GUI
             }
         }
 
+        private void BulkSelectUpdate(bool select = true)
+        {
+            for (int i = 0; i < _points.Count; i++)
+            {
+                _points[i].IsSelected = select;
+            }
+        }
+
         /// <summary>
         /// Selects all keyframes.
         /// </summary>
         public void SelectAll()
         {
-            for (int i = 0; i < _points.Count; i++)
+            BulkSelectUpdate(true);
-            {
+        }
-                _points[i].IsSelected = true;
+
-            }
+        /// <summary>
+        /// Deselects all keyframes.
+        /// </summary>
+        public void DeselectAll()
+        {
+            BulkSelectUpdate(false);
         }
 
         /// <summary>
@@ -899,8 +913,8 @@ namespace FlaxEditor.GUI
                  _mainPanel.PointToParent(_contents.PointToParent(_contents._leftMouseDownPos)),
                  _mainPanel.PointToParent(_contents.PointToParent(_contents._mousePos))
                 );
-                Render2D.FillRectangle(selectionRect, Color.Orange * 0.4f);
+                Render2D.FillRectangle(selectionRect, style.Selection);
-                Render2D.DrawRectangle(selectionRect, Color.Orange);
+                Render2D.DrawRectangle(selectionRect, style.SelectionBorder);
             }
 
             base.Draw();
@@ -926,34 +940,35 @@ namespace FlaxEditor.GUI
             if (base.OnKeyDown(key))
                 return true;
 
-            switch (key)
+            InputOptions options = Editor.Instance.Options.Options.Input;
+            if (options.SelectAll.Process(this))
+            {
+                SelectAll();
+                UpdateTangents();
+                return true;
+            }
+            else if (options.DeselectAll.Process(this))
+            {
+                DeselectAll();
+                UpdateTangents();
+                return true;
+            }
+            else if (options.Delete.Process(this))
             {
-            case KeyboardKeys.Delete:
                 RemoveKeyframes();
                 return true;
-            case KeyboardKeys.A:
-                if (Root.GetKey(KeyboardKeys.Control))
-                {
-                    SelectAll();
-                    UpdateTangents();
-                    return true;
-                }
-                break;
-            case KeyboardKeys.C:
-                if (Root.GetKey(KeyboardKeys.Control))
-                {
-                    CopyKeyframes();
-                    return true;
-                }
-                break;
-            case KeyboardKeys.V:
-                if (Root.GetKey(KeyboardKeys.Control))
-                {
-                    KeyframesEditorUtils.Paste(this);
-                    return true;
-                }
-                break;
             }
+            else if (options.Copy.Process(this))
+            {
+                CopyKeyframes();
+                return true;
+            }
+            else if (options.Paste.Process(this))
+            {
+                KeyframesEditorUtils.Paste(this);
+                return true;
+            }
+
             return false;
         }
 

Source/Editor/GUI/Input/ValueBox.cs

@@ -201,8 +201,9 @@ namespace FlaxEditor.GUI.Input
                 if (_isSliding)
                 {
                     // Draw overlay
-                    // TODO: render nicer overlay with some glow from the borders (inside)
+                    var bounds = new Rectangle(Float2.Zero, Size);
-                    Render2D.FillRectangle(new Rectangle(Float2.Zero, Size), Color.Orange * 0.3f);
+                    Render2D.FillRectangle(bounds, style.Selection);
+                    Render2D.DrawRectangle(bounds, style.SelectionBorder);
                 }
             }
         }

Source/Editor/GUI/ItemsListContextMenu.cs

@@ -122,6 +122,10 @@ namespace FlaxEditor.GUI
                 if (IsMouseOver || IsFocused)
                     Render2D.FillRectangle(new Rectangle(Float2.Zero, Size), style.BackgroundHighlighted);
 
+                // Indent for drop panel items is handled by drop panel margin
+                if (Parent is not DropPanel)
+                    textRect.Location += new Float2(Editor.Instance.Icons.ArrowRight12.Size.X + 2, 0);
+
                 // Draw all highlights
                 if (_highlights != null)
                 {
@@ -262,6 +266,10 @@ namespace FlaxEditor.GUI
                         }
                     }
                     category.Visible = anyVisible;
+                    if (string.IsNullOrEmpty(_searchBox.Text))
+                        category.Close(false);
+                    else
+                        category.Open(false);
                 }
             }
 
@@ -338,9 +346,14 @@ namespace FlaxEditor.GUI
                     var categoryPanel = new DropPanel
                     {
                         HeaderText = item.Category,
+                        ArrowImageOpened = new SpriteBrush(Editor.Instance.Icons.ArrowDown12),
+                        ArrowImageClosed = new SpriteBrush(Editor.Instance.Icons.ArrowRight12),
+                        EnableDropDownIcon = true,
+                        ItemsMargin = new Margin(28, 0, 2, 2),
+                        HeaderColor = Style.Current.Background,
                         Parent = parent,
                     };
-                    categoryPanel.Open(false);
+                    categoryPanel.Close(false);
                     _categoryPanels.Add(categoryPanel);
                     parent = categoryPanel;
                 }
@@ -382,6 +395,7 @@ namespace FlaxEditor.GUI
                             item2.UpdateFilter(null);
                     }
                     category.Visible = true;
+                    category.Close(false);
                 }
             }
 

Source/Editor/GUI/NavigationButton.cs

@@ -45,7 +45,8 @@ namespace FlaxEditor.GUI
             // Draw background
             if (IsDragOver && _validDragOver)
             {
-                Render2D.FillRectangle(clientRect, Style.Current.BackgroundSelected * 0.6f);
+                Render2D.FillRectangle(clientRect, style.Selection);
+                Render2D.DrawRectangle(clientRect, style.SelectionBorder);
             }
             else if (_isPressed)
             {

Source/Editor/GUI/Timeline/GUI/Background.cs

@@ -227,8 +227,8 @@ namespace FlaxEditor.GUI.Timeline.GUI
             if (_isSelecting)
             {
                 var selectionRect = Rectangle.FromPoints(_selectingStartPos, _mousePos);
-                Render2D.FillRectangle(selectionRect, Color.Orange * 0.4f);
+                Render2D.FillRectangle(selectionRect, style.Selection);
-                Render2D.DrawRectangle(selectionRect, Color.Orange);
+                Render2D.DrawRectangle(selectionRect, style.SelectionBorder);
             }
 
             DrawChildren();

Source/Editor/GUI/Timeline/GUI/KeyframesEditor.cs

@@ -7,6 +7,7 @@ using System.Linq;
 using System.Text;
 using FlaxEditor.CustomEditors;
 using FlaxEditor.GUI.ContextMenu;
+using FlaxEditor.Options;
 using FlaxEditor.Scripting;
 using FlaxEngine;
 using FlaxEngine.GUI;
@@ -432,6 +433,7 @@ namespace FlaxEditor.GUI
                         if (_editor.EnableKeyframesValueEdit)
                             cm.AddButton("Edit all keyframes", () => _editor.EditAllKeyframes(this, location));
                         cm.AddButton("Select all keyframes", _editor.SelectAll).Enabled = _editor._points.Count > 0;
+                        cm.AddButton("Deselect all keyframes", _editor.DeselectAll).Enabled = _editor._points.Count > 0;
                         cm.AddButton("Copy all keyframes", () =>
                         {
                             _editor.SelectAll();
@@ -902,7 +904,7 @@ namespace FlaxEditor.GUI
             var k = new Keyframe
             {
                 Time = keyframesPos.X,
-                Value = DefaultValue,
+                Value = Utilities.Utils.CloneValue(DefaultValue),
             };
             OnEditingStart();
             AddKeyframe(k);
@@ -1209,15 +1211,28 @@ namespace FlaxEditor.GUI
             }
         }
 
+        private void BulkSelectUpdate(bool select = true)
+        {
+            for (int i = 0; i < _points.Count; i++)
+            {
+                _points[i].IsSelected = select;
+            }
+        }
+
         /// <summary>
         /// Selects all keyframes.
         /// </summary>
         public void SelectAll()
         {
-            for (int i = 0; i < _points.Count; i++)
+            BulkSelectUpdate(true);
-            {
+        }
-                _points[i].IsSelected = true;
+
-            }
+        /// <summary>
+        /// Deselects all keyframes.
+        /// </summary>
+        public void DeselectAll()
+        {
+            BulkSelectUpdate(false);
         }
 
         /// <inheritdoc />
@@ -1241,8 +1256,8 @@ namespace FlaxEditor.GUI
                  _mainPanel.PointToParent(_contents.PointToParent(_contents._leftMouseDownPos)),
                  _mainPanel.PointToParent(_contents.PointToParent(_contents._mousePos))
                 );
-                Render2D.FillRectangle(selectionRect, Color.Orange * 0.4f);
+                Render2D.FillRectangle(selectionRect, style.Selection);
-                Render2D.DrawRectangle(selectionRect, Color.Orange);
+                Render2D.DrawRectangle(selectionRect, style.SelectionBorder);
             }
 
             base.Draw();
@@ -1268,33 +1283,33 @@ namespace FlaxEditor.GUI
             if (base.OnKeyDown(key))
                 return true;
 
-            switch (key)
+            InputOptions options = Editor.Instance.Options.Options.Input;
+            if (options.SelectAll.Process(this))
+            {
+                SelectAll();
+                return true;
+            }
+            else if (options.DeselectAll.Process(this))
+            {
+                DeselectAll();
+                return true;
+            }
+            else if (options.Delete.Process(this))
             {
-            case KeyboardKeys.Delete:
                 RemoveKeyframes();
                 return true;
-            case KeyboardKeys.A:
-                if (Root.GetKey(KeyboardKeys.Control))
-                {
-                    SelectAll();
-                    return true;
-                }
-                break;
-            case KeyboardKeys.C:
-                if (Root.GetKey(KeyboardKeys.Control))
-                {
-                    CopyKeyframes();
-                    return true;
-                }
-                break;
-            case KeyboardKeys.V:
-                if (Root.GetKey(KeyboardKeys.Control))
-                {
-                    KeyframesEditorUtils.Paste(this);
-                    return true;
-                }
-                break;
             }
+            else if (options.Copy.Process(this))
+            {
+                CopyKeyframes();
+                return true;
+            }
+            else if (options.Paste.Process(this))
+            {
+                KeyframesEditorUtils.Paste(this);
+                return true;
+            }
+
             return false;
         }
 

Source/Editor/GUI/Timeline/Timeline.UI.cs

@@ -304,7 +304,9 @@ namespace FlaxEditor.GUI.Timeline
                 if (IsDragOver && _currentDragEffect != DragDropEffect.None)
                 {
                     var style = Style.Current;
-                    Render2D.FillRectangle(new Rectangle(Float2.Zero, Size), style.BackgroundSelected * 0.4f);
+                    var bounds = new Rectangle(Float2.Zero, Size);
+                    Render2D.FillRectangle(bounds, style.Selection);
+                    Render2D.DrawRectangle(bounds, style.SelectionBorder);
                 }
 
                 base.Draw();

Source/Editor/GUI/Timeline/Timeline.cs

@@ -187,6 +187,11 @@ namespace FlaxEditor.GUI.Timeline
         private bool _showPreviewValues = true;
         private PlaybackStates _state = PlaybackStates.Disabled;
 
+        /// <summary>
+        /// The Track that is being dragged over. This could have a value when not dragging.
+        /// </summary>
+        internal Track DraggedOverTrack = null;
+
         /// <summary>
         /// Flag used to mark modified timeline data.
         /// </summary>

Source/Editor/GUI/Timeline/Track.cs

@@ -774,14 +774,33 @@ namespace FlaxEditor.GUI.Timeline
         /// Updates the drag over mode based on the given mouse location.
         /// </summary>
         /// <param name="location">The location.</param>
-        private void UpdateDrawPositioning(ref Float2 location)
+        private void UpdateDragPositioning(ref Float2 location)
         {
+            // Check collision with drag areas
             if (new Rectangle(0, 0 - DefaultDragInsertPositionMargin - DefaultNodeOffsetY, Width, DefaultDragInsertPositionMargin * 2.0f).Contains(location))
                 _dragOverMode = DragItemPositioning.Above;
             else if (IsCollapsed && new Rectangle(0, Height - DefaultDragInsertPositionMargin, Width, DefaultDragInsertPositionMargin * 2.0f).Contains(location))
                 _dragOverMode = DragItemPositioning.Below;
             else
                 _dragOverMode = DragItemPositioning.At;
+
+            // Update DraggedOverTrack
+            var timeline = Timeline;
+            if (_dragOverMode == DragItemPositioning.None)
+            {
+                if (timeline != null && timeline.DraggedOverTrack == this)
+                    timeline.DraggedOverTrack = null;
+            }
+            else if (timeline != null)
+                timeline.DraggedOverTrack = this;
+        }
+
+        private void ClearDragPositioning()
+        {
+            _dragOverMode = DragItemPositioning.None;
+            var timeline = Timeline;
+            if (timeline != null && timeline.DraggedOverTrack == this)
+                timeline.DraggedOverTrack = null;
         }
 
         /// <summary>
@@ -975,26 +994,21 @@ namespace FlaxEditor.GUI.Timeline
             }
 
             // Draw drag and drop effect
-            if (IsDragOver && _isDragOverHeader)
+            if (IsDragOver && _timeline.DraggedOverTrack == this)
             {
-                Color dragOverColor = style.BackgroundSelected * 0.6f;
-                Rectangle rect;
                 switch (_dragOverMode)
                 {
                 case DragItemPositioning.At:
-                    rect = textRect;
+                    Render2D.FillRectangle(textRect, style.Selection);
+                    Render2D.DrawRectangle(textRect, style.SelectionBorder);
                     break;
                 case DragItemPositioning.Above:
-                    rect = new Rectangle(textRect.X, textRect.Y - DefaultDragInsertPositionMargin - DefaultNodeOffsetY, textRect.Width, DefaultDragInsertPositionMargin * 2.0f);
+                    Render2D.DrawRectangle(new Rectangle(textRect.X, textRect.Top - DefaultDragInsertPositionMargin * 0.5f - DefaultNodeOffsetY - _margin.Top, textRect.Width, DefaultDragInsertPositionMargin), style.SelectionBorder);
                     break;
                 case DragItemPositioning.Below:
-                    rect = new Rectangle(textRect.X, textRect.Bottom - DefaultDragInsertPositionMargin, textRect.Width, DefaultDragInsertPositionMargin * 2.0f);
+                    Render2D.DrawRectangle(new Rectangle(textRect.X, textRect.Bottom + _margin.Bottom - DefaultDragInsertPositionMargin * 0.5f, textRect.Width, DefaultDragInsertPositionMargin), style.SelectionBorder);
-                    break;
-                default:
-                    rect = Rectangle.Empty;
                     break;
                 }
-                Render2D.FillRectangle(rect, dragOverColor);
             }
 
             base.Draw();
@@ -1170,18 +1184,18 @@ namespace FlaxEditor.GUI.Timeline
             _dragOverMode = DragItemPositioning.None;
             if (result == DragDropEffect.None)
             {
-                UpdateDrawPositioning(ref location);
+                UpdateDragPositioning(ref location);
 
                 // Check if mouse is over header
                 _isDragOverHeader = TestHeaderHit(ref location);
                 if (_isDragOverHeader)
                 {
-                    // Check if mouse is over arrow
+                    if (Timeline != null)
+                        Timeline.DraggedOverTrack = this;
+
+                    // Expand node if mouse goes over arrow
                     if (_children.Count > 0 && ArrowRect.Contains(location))
-                    {
-                        // Expand track
                         Expand();
-                    }
 
                     result = OnDragEnterHeader(data);
                 }
@@ -1199,21 +1213,18 @@ namespace FlaxEditor.GUI.Timeline
             var result = base.OnDragMove(ref location, data);
 
             // Check if no children handled that event
-            _dragOverMode = DragItemPositioning.None;
+            ClearDragPositioning();
             if (result == DragDropEffect.None)
             {
-                UpdateDrawPositioning(ref location);
+                UpdateDragPositioning(ref location);
 
                 // Check if mouse is over header
                 bool isDragOverHeader = TestHeaderHit(ref location);
                 if (isDragOverHeader)
                 {
-                    // Check if mouse is over arrow
+                    // Expand node if mouse goes over arrow
                     if (_children.Count > 0 && ArrowRect.Contains(location))
-                    {
-                        // Expand track
                         Expand();
-                    }
 
                     if (!_isDragOverHeader)
                         result = OnDragEnterHeader(data);
@@ -1226,10 +1237,8 @@ namespace FlaxEditor.GUI.Timeline
                 }
                 _isDragOverHeader = isDragOverHeader;
 
-                if (result == DragDropEffect.None || !isDragOverHeader)
+                if (result == DragDropEffect.None)
-                {
                     _dragOverMode = DragItemPositioning.None;
-                }
             }
 
             return result;
@@ -1243,7 +1252,7 @@ namespace FlaxEditor.GUI.Timeline
             // Check if no children handled that event
             if (result == DragDropEffect.None)
             {
-                UpdateDrawPositioning(ref location);
+                UpdateDragPositioning(ref location);
 
                 // Check if mouse is over header
                 if (TestHeaderHit(ref location))
@@ -1254,7 +1263,7 @@ namespace FlaxEditor.GUI.Timeline
 
             // Clear cache
             _isDragOverHeader = false;
-            _dragOverMode = DragItemPositioning.None;
+            ClearDragPositioning();
 
             return result;
         }
@@ -1262,15 +1271,15 @@ namespace FlaxEditor.GUI.Timeline
         /// <inheritdoc />
         public override void OnDragLeave()
         {
-            base.OnDragLeave();
-
             // Clear cache
             if (_isDragOverHeader)
             {
                 _isDragOverHeader = false;
                 OnDragLeaveHeader();
             }
-            _dragOverMode = DragItemPositioning.None;
+            ClearDragPositioning();
+
+            base.OnDragLeave();
         }
 
         /// <inheritdoc />

Source/Editor/GUI/Timeline/Tracks/ActorTrack.cs

@@ -204,7 +204,7 @@ namespace FlaxEditor.GUI.Timeline.Tracks
                     b.TooltipText = Utilities.Utils.GetTooltip(actorNode.Actor);
                 }
             }
-            menu.AddButton("Select...", OnClickedSelect).TooltipText = "Opens actor picker dialog to select the target actor for this track";
+            menu.AddButton("Retarget...", OnClickedSelect).TooltipText = "Opens actor picker dialog to select the target actor for this track";
         }
 
         /// <summary>

Source/Editor/GUI/Timeline/Tracks/KeyframesPropertyTrack.cs

@@ -7,6 +7,8 @@ using System.Reflection;
 using System.Runtime.InteropServices;
 using System.Text;
 using FlaxEditor.GUI.Timeline.Undo;
+using FlaxEditor.Scripting;
+using FlaxEditor.Utilities;
 using FlaxEngine;
 using FlaxEngine.GUI;
 using FlaxEngine.Utilities;
@@ -56,7 +58,6 @@ namespace FlaxEditor.GUI.Timeline.Tracks
                 throw new Exception("Invalid track data.");
 
             var keyframes = new KeyframesEditor.Keyframe[keyframesCount];
-            var dataBuffer = new byte[e.ValueSize];
             var propertyType = TypeUtils.GetManagedType(e.MemberTypeName);
             if (propertyType == null)
             {
@@ -67,20 +68,40 @@ namespace FlaxEditor.GUI.Timeline.Tracks
                 return;
             }
 
-            GCHandle handle = GCHandle.Alloc(dataBuffer, GCHandleType.Pinned);
+            if (e.ValueSize != 0)
-            for (int i = 0; i < keyframesCount; i++)
             {
-                var time = stream.ReadSingle();
+                // POD value type - use raw memory
-                stream.Read(dataBuffer, 0, e.ValueSize);
+                var dataBuffer = new byte[e.ValueSize];
-                var value = Marshal.PtrToStructure(handle.AddrOfPinnedObject(), propertyType);
+                GCHandle handle = GCHandle.Alloc(dataBuffer, GCHandleType.Pinned);
-
+                for (int i = 0; i < keyframesCount; i++)
-                keyframes[i] = new KeyframesEditor.Keyframe
                 {
-                    Time = time,
+                    var time = stream.ReadSingle();
-                    Value = value,
+                    stream.Read(dataBuffer, 0, e.ValueSize);
-                };
+                    var value = Marshal.PtrToStructure(handle.AddrOfPinnedObject(), propertyType);
+
+                    keyframes[i] = new KeyframesEditor.Keyframe
+                    {
+                        Time = time,
+                        Value = value,
+                    };
+                }
+                handle.Free();
+            }
+            else
+            {
+                // Generic value - use Json storage (as UTF-8)
+                for (int i = 0; i < keyframesCount; i++)
+                {
+                    var time = stream.ReadSingle();
+                    var len = stream.ReadInt32();
+                    var value = len != 0 ? FlaxEngine.Json.JsonSerializer.Deserialize(Encoding.UTF8.GetString(stream.ReadBytes(len)), propertyType) : null;
+                    keyframes[i] = new KeyframesEditor.Keyframe
+                    {
+                        Time = time,
+                        Value = value,
+                    };
+                }
             }
-            handle.Free();
 
             e.Keyframes.DefaultValue = e.GetDefaultValue(propertyType);
             e.Keyframes.SetKeyframes(keyframes);
@@ -113,17 +134,35 @@ namespace FlaxEditor.GUI.Timeline.Tracks
             stream.Write(propertyTypeNameData);
             stream.Write('\0');
 
-            var dataBuffer = new byte[e.ValueSize];
+            if (e.ValueSize != 0)
-            IntPtr ptr = Marshal.AllocHGlobal(e.ValueSize);
-            for (int i = 0; i < keyframes.Count; i++)
             {
-                var keyframe = keyframes[i];
+                // POD value type - use raw memory
-                Marshal.StructureToPtr(keyframe.Value, ptr, true);
+                var dataBuffer = new byte[e.ValueSize];
-                Marshal.Copy(ptr, dataBuffer, 0, e.ValueSize);
+                IntPtr ptr = Marshal.AllocHGlobal(e.ValueSize);
-                stream.Write(keyframe.Time);
+                for (int i = 0; i < keyframes.Count; i++)
-                stream.Write(dataBuffer);
+                {
+                    var keyframe = keyframes[i];
+                    Marshal.StructureToPtr(keyframe.Value, ptr, true);
+                    Marshal.Copy(ptr, dataBuffer, 0, e.ValueSize);
+                    stream.Write(keyframe.Time);
+                    stream.Write(dataBuffer);
+                }
+                Marshal.FreeHGlobal(ptr);
+            }
+            else
+            {
+                // Generic value - use Json storage (as UTF-8)
+                for (int i = 0; i < keyframes.Count; i++)
+                {
+                    var keyframe = keyframes[i];
+                    stream.Write(keyframe.Time);
+                    var json = keyframe.Value != null ? FlaxEngine.Json.JsonSerializer.Serialize(keyframe.Value) : null;
+                    var len = json?.Length ?? 0;
+                    stream.Write(len);
+                    if (len > 0)
+                        stream.Write(Encoding.UTF8.GetBytes(json));
+                }
             }
-            Marshal.FreeHGlobal(ptr);
         }
 
         private byte[] _keyframesEditingStartData;
@@ -281,7 +320,7 @@ namespace FlaxEditor.GUI.Timeline.Tracks
         private void OnKeyframesEditingEnd()
         {
             var after = EditTrackAction.CaptureData(this);
-            if (!Utils.ArraysEqual(_keyframesEditingStartData, after))
+            if (!FlaxEngine.Utils.ArraysEqual(_keyframesEditingStartData, after))
                 Timeline.AddBatchedUndoAction(new EditTrackAction(Timeline, this, _keyframesEditingStartData, after));
             _keyframesEditingStartData = null;
         }
@@ -308,7 +347,10 @@ namespace FlaxEditor.GUI.Timeline.Tracks
         /// <returns>The default value.</returns>
         protected virtual object GetDefaultValue(Type propertyType)
         {
-            return Activator.CreateInstance(propertyType);
+            var value = TypeUtils.GetDefaultValue(new ScriptType(propertyType));
+            if (value == null)
+                value = Activator.CreateInstance(propertyType);
+            return value;
         }
 
         /// <inheritdoc />

Source/Editor/GUI/Timeline/Tracks/ObjectTrack.cs

@@ -424,6 +424,7 @@ namespace FlaxEditor.GUI.Timeline.Tracks
             { typeof(Guid), KeyframesPropertyTrack.GetArchetype() },
             { typeof(DateTime), KeyframesPropertyTrack.GetArchetype() },
             { typeof(TimeSpan), KeyframesPropertyTrack.GetArchetype() },
+            { typeof(LocalizedString), KeyframesPropertyTrack.GetArchetype() },
             { typeof(string), StringPropertyTrack.GetArchetype() },
         };
     }

Source/Editor/GUI/Tree/Tree.cs

@@ -3,6 +3,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using FlaxEditor.Options;
 using FlaxEngine;
 using FlaxEngine.Assertions;
 using FlaxEngine.GUI;
@@ -43,7 +44,7 @@ namespace FlaxEditor.GUI.Tree
         /// <summary>
         /// The TreeNode that is being dragged over. This could have a value when not dragging.
         /// </summary>
-        public TreeNode DraggedOverNode = null;
+        internal TreeNode DraggedOverNode = null;
 
         /// <summary>
         /// Action fired when tree nodes selection gets changed.
@@ -315,10 +316,7 @@ namespace FlaxEditor.GUI.Tree
             }
         }
 
-        /// <summary>
+        private void BulkSelectUpdateExpanded(bool select = true)
-        /// Select all expanded nodes
-        /// </summary>
-        public void SelectAllExpanded()
         {
             if (_supportMultiSelect)
             {
@@ -327,7 +325,8 @@ namespace FlaxEditor.GUI.Tree
 
                 // Update selection
                 Selection.Clear();
-                WalkSelectExpandedTree(Selection, _children[0] as TreeNode);
+                if (select)
+                    WalkSelectExpandedTree(Selection, _children[0] as TreeNode);
 
                 // Check if changed
                 if (Selection.Count != prev.Count || !Selection.SequenceEqual(prev))
@@ -338,6 +337,22 @@ namespace FlaxEditor.GUI.Tree
             }
         }
 
+        /// <summary>
+        /// Select all expanded nodes
+        /// </summary>
+        public void SelectAllExpanded()
+        {
+            BulkSelectUpdateExpanded(true);
+        }
+
+        /// <summary>
+        /// Deselect all nodes
+        /// </summary>
+        public void DeselectAll()
+        {
+            BulkSelectUpdateExpanded(false);
+        }
+
         /// <inheritdoc />
         public override void Update(float deltaTime)
         {
@@ -472,14 +487,19 @@ namespace FlaxEditor.GUI.Tree
             // Check if can use multi selection
             if (_supportMultiSelect)
             {
-                bool isCtrlDown = Root.GetKey(KeyboardKeys.Control);
+                InputOptions options = Editor.Instance.Options.Options.Input;
 
                 // Select all expanded nodes
-                if (key == KeyboardKeys.A && isCtrlDown)
+                if (options.SelectAll.Process(this))
                 {
                     SelectAllExpanded();
                     return true;
                 }
+                else if (options.DeselectAll.Process(this))
+                {
+                    DeselectAll();
+                    return true;
+                }
             }
 
             return base.OnKeyDown(key);

Source/Editor/GUI/Tree/TreeNode.cs

@@ -16,7 +16,7 @@ namespace FlaxEditor.GUI.Tree
         /// <summary>
         /// The default drag insert position margin.
         /// </summary>
-        public const float DefaultDragInsertPositionMargin = 2.0f;
+        public const float DefaultDragInsertPositionMargin = 3.0f;
 
         /// <summary>
         /// The default node offset on Y axis.
@@ -42,6 +42,7 @@ namespace FlaxEditor.GUI.Tree
 
         private DragItemPositioning _dragOverMode;
         private bool _isDragOverHeader;
+        private static ulong _dragEndFrame;
 
         /// <summary>
         /// Gets or sets the text.
@@ -546,14 +547,33 @@ namespace FlaxEditor.GUI.Tree
         /// Updates the drag over mode based on the given mouse location.
         /// </summary>
         /// <param name="location">The location.</param>
-        private void UpdateDrawPositioning(ref Float2 location)
+        private void UpdateDragPositioning(ref Float2 location)
         {
+            // Check collision with drag areas
             if (new Rectangle(_headerRect.X, _headerRect.Y - DefaultDragInsertPositionMargin - DefaultNodeOffsetY, _headerRect.Width, DefaultDragInsertPositionMargin * 2.0f).Contains(location))
                 _dragOverMode = DragItemPositioning.Above;
             else if ((IsCollapsed || !HasAnyVisibleChild) && new Rectangle(_headerRect.X, _headerRect.Bottom - DefaultDragInsertPositionMargin, _headerRect.Width, DefaultDragInsertPositionMargin * 2.0f).Contains(location))
                 _dragOverMode = DragItemPositioning.Below;
             else
                 _dragOverMode = DragItemPositioning.At;
+
+            // Update DraggedOverNode
+            var tree = ParentTree;
+            if (_dragOverMode == DragItemPositioning.None)
+            {
+                if (tree != null && tree.DraggedOverNode == this)
+                    tree.DraggedOverNode = null;
+            }
+            else if (tree != null)
+                tree.DraggedOverNode = this;
+        }
+
+        private void ClearDragPositioning()
+        {
+            _dragOverMode = DragItemPositioning.None;
+            var tree = ParentTree;
+            if (tree != null && tree.DraggedOverNode == this)
+                tree.DraggedOverNode = null;
         }
 
         /// <summary>
@@ -661,27 +681,19 @@ namespace FlaxEditor.GUI.Tree
             // Draw drag and drop effect
             if (IsDragOver && _tree.DraggedOverNode == this)
             {
-                Color dragOverColor = style.BackgroundSelected;
-                Rectangle rect;
                 switch (_dragOverMode)
                 {
                 case DragItemPositioning.At:
-                    dragOverColor *= 0.6f;
+                    Render2D.FillRectangle(textRect, style.Selection);
-                    rect = textRect;
+                    Render2D.DrawRectangle(textRect, style.SelectionBorder);
                     break;
                 case DragItemPositioning.Above:
-                    dragOverColor *= 1.2f;
+                    Render2D.DrawRectangle(new Rectangle(textRect.X, textRect.Top - DefaultDragInsertPositionMargin * 0.5f - DefaultNodeOffsetY - _margin.Top, textRect.Width, DefaultDragInsertPositionMargin), style.SelectionBorder);
-                    rect = new Rectangle(textRect.X, textRect.Top - DefaultDragInsertPositionMargin - DefaultNodeOffsetY - _margin.Top, textRect.Width, DefaultDragInsertPositionMargin * 2.0f);
                     break;
                 case DragItemPositioning.Below:
-                    dragOverColor *= 1.2f;
+                    Render2D.DrawRectangle(new Rectangle(textRect.X, textRect.Bottom + _margin.Bottom - DefaultDragInsertPositionMargin * 0.5f, textRect.Width, DefaultDragInsertPositionMargin), style.SelectionBorder);
-                    rect = new Rectangle(textRect.X, textRect.Bottom + _margin.Bottom - DefaultDragInsertPositionMargin, textRect.Width, DefaultDragInsertPositionMargin * 2.0f);
-                    break;
-                default:
-                    rect = Rectangle.Empty;
                     break;
                 }
-                Render2D.FillRectangle(rect, dragOverColor);
             }
 
             // Base
@@ -736,9 +748,8 @@ namespace FlaxEditor.GUI.Tree
             UpdateMouseOverFlags(location);
 
             // Clear flag for left button
-            if (button == MouseButton.Left)
+            if (button == MouseButton.Left && _isMouseDown)
             {
-                // Clear flag
                 _isMouseDown = false;
                 _mouseDownTime = -1;
             }
@@ -746,6 +757,10 @@ namespace FlaxEditor.GUI.Tree
             // Check if mouse hits bar and node isn't a root
             if (_mouseOverHeader)
             {
+                // Skip mouse up event right after drag drop ends
+                if (button == MouseButton.Left && Engine.FrameCount - _dragEndFrame < 10)
+                    return true;
+
                 // Prevent from selecting node when user is just clicking at an arrow
                 if (!_mouseOverArrow)
                 {
@@ -937,20 +952,18 @@ namespace FlaxEditor.GUI.Tree
             _dragOverMode = DragItemPositioning.None;
             if (result == DragDropEffect.None)
             {
-                UpdateDrawPositioning(ref location);
+                UpdateDragPositioning(ref location);
-                if (ParentTree != null)
-                    ParentTree.DraggedOverNode = this;
 
                 // Check if mouse is over header
                 _isDragOverHeader = TestHeaderHit(ref location);
                 if (_isDragOverHeader)
                 {
-                    // Check if mouse is over arrow
+                    if (ParentTree != null)
+                        ParentTree.DraggedOverNode = this;
+
+                    // Expand node if mouse goes over arrow
                     if (ArrowRect.Contains(location) && HasAnyVisibleChild)
-                    {
-                        // Expand node (no animation)
                         Expand(true);
-                    }
 
                     result = OnDragEnterHeader(data);
                 }
@@ -968,26 +981,31 @@ namespace FlaxEditor.GUI.Tree
             var result = base.OnDragMove(ref location, data);
 
             // Check if no children handled that event
-            _dragOverMode = DragItemPositioning.None;
+            ClearDragPositioning();
             if (result == DragDropEffect.None)
             {
-                UpdateDrawPositioning(ref location);
+                UpdateDragPositioning(ref location);
 
                 // Check if mouse is over header
                 bool isDragOverHeader = TestHeaderHit(ref location);
                 if (isDragOverHeader)
                 {
-                    if (ArrowRect.Contains(location) && HasAnyVisibleChild)
+                    if (ParentTree != null)
-                    {
+                        ParentTree.DraggedOverNode = this;
-                        // Expand node (no animation)
-                        Expand(true);
-                    }
 
+                    // Expand node if mouse goes over arrow
+                    if (ArrowRect.Contains(location) && HasAnyVisibleChild)
+                        Expand(true);
+                    
                     if (!_isDragOverHeader)
                         result = OnDragEnterHeader(data);
                     else
                         result = OnDragMoveHeader(data);
                 }
+                else if (_isDragOverHeader)
+                {
+                    OnDragLeaveHeader();
+                }
                 _isDragOverHeader = isDragOverHeader;
 
                 if (result == DragDropEffect.None)
@@ -1005,7 +1023,8 @@ namespace FlaxEditor.GUI.Tree
             // Check if no children handled that event
             if (result == DragDropEffect.None)
             {
-                UpdateDrawPositioning(ref location);
+                UpdateDragPositioning(ref location);
+                _dragEndFrame = Engine.FrameCount;
 
                 // Check if mouse is over header
                 if (TestHeaderHit(ref location))
@@ -1016,9 +1035,7 @@ namespace FlaxEditor.GUI.Tree
 
             // Clear cache
             _isDragOverHeader = false;
-            _dragOverMode = DragItemPositioning.None;
+            ClearDragPositioning();
-            if (ParentTree != null)
-                ParentTree.DraggedOverNode = null;
 
             return result;
         }
@@ -1032,7 +1049,7 @@ namespace FlaxEditor.GUI.Tree
                 _isDragOverHeader = false;
                 OnDragLeaveHeader();
             }
-            _dragOverMode = DragItemPositioning.None;
+            ClearDragPositioning();
 
             base.OnDragLeave();
         }

Source/Editor/Gizmo/TransformGizmo.cs

@@ -263,6 +263,8 @@ namespace FlaxEditor.Gizmo
             // Note: because selection may contain objects and their children we have to split them and get only parents.
             // Later during transformation we apply translation/scale/rotation only on them (children inherit transformations)
             SceneGraphTools.BuildNodesParents(_selection, _selectionParents);
+
+            base.OnSelectionChanged(newSelection);
         }
 
         /// <inheritdoc />

Source/Editor/Gizmo/TransformGizmoBase.cs

@@ -437,8 +437,6 @@ namespace FlaxEditor.Gizmo
                     {
                     case Mode.Translate:
                         UpdateTranslateScale();
-                        if (Owner.SnapToVertex)
-                            UpdateVertexSnapping();
                         break;
                     case Mode.Scale:
                         UpdateTranslateScale();
@@ -447,6 +445,8 @@ namespace FlaxEditor.Gizmo
                         UpdateRotate(dt);
                         break;
                     }
+                    if (Owner.SnapToVertex)
+                        UpdateVertexSnapping();
                 }
                 else
                 {
@@ -553,41 +553,21 @@ namespace FlaxEditor.Gizmo
             for (int i = 0; i < SelectionCount; i++)
             {
                 var obj = GetSelectedObject(i);
-                if (obj.CanVertexSnap && obj.RayCastSelf(ref ray, out var distance, out _) && distance < closestDistance)
+                if (obj.RayCastSelf(ref ray, out var distance, out _) && distance < closestDistance)
                 {
                     closestDistance = distance;
                     closestObject = obj;
                 }
             }
             if (closestObject == null)
-            {
+                return; // ignore it if there is nothing under the mouse closestObject is only null if ray caster missed everything or Selection Count == 0
-                // Find the closest object in selection (in case ray didn't hit anything)
-                for (int i = 0; i < SelectionCount; i++)
-                {
-                    var obj = GetSelectedObject(i);
-                    if (obj.CanVertexSnap)
-                    {
-                        GetSelectedObjectsBounds(out var bounds, out _);
-                        CollisionsHelper.ClosestPointBoxPoint(ref bounds, ref ray.Ray.Position, out var point);
-                        var distance = Vector3.Distance(ref point, ref ray.Ray.Position);
-                        if (distance < closestDistance)
-                        {
-                            closestDistance = distance;
-                            closestObject = obj;
-                        }
-                    }
-                }
-            }
-            _vertexSnapObject = closestObject;
-            if (closestObject == null)
-                return;
 
-            // Find the closest vertex to bounding box point (collision detection approximation)
+            _vertexSnapObject = closestObject;
-            var closestPoint = ray.Ray.GetPoint(closestDistance);
+            if (!closestObject.OnVertexSnap(ref ray.Ray, closestDistance, out _vertexSnapPoint))
-            if (!closestObject.OnVertexSnap(ref closestPoint, out _vertexSnapPoint))
             {
-                // Failed to get the closest point
+                // The OnVertexSnap is unimplemented or failed to get point return because there is nothing to do
-                _vertexSnapPoint = closestPoint;
+                _vertexSnapPoint = Vector3.Zero;
+                return;
             }
 
             // Transform back to the local space of the object to work when moving it
@@ -619,12 +599,11 @@ namespace FlaxEditor.Gizmo
             for (int i = 0; i < SelectionCount; i++)
                 rayCast.ExcludeObjects.Add(GetSelectedObject(i));
             var hit = Owner.SceneGraphRoot.RayCast(ref rayCast, out var distance, out var _);
-            if (hit != null && hit.CanVertexSnap)
+            if (hit != null)
             {
-                var point = rayCast.Ray.GetPoint(distance);
+                if (hit.OnVertexSnap(ref rayCast.Ray, distance, out var pointSnapped)
-                if (hit.OnVertexSnap(ref point, out var pointSnapped) 
                     //&& Vector3.Distance(point, pointSnapped) <= 25.0f
-                    )
+                   )
                 {
                     _vertexSnapObjectTo = hit;
                     _vertexSnapPointTo = hit.Transform.WorldToLocal(pointSnapped);
@@ -712,5 +691,12 @@ namespace FlaxEditor.Gizmo
         protected virtual void OnDuplicate()
         {
         }
+
+        /// <inheritdoc />
+        public override void OnSelectionChanged(List<SceneGraphNode> newSelection)
+        {
+            EndVertexSnapping();
+            UpdateGizmoPosition();
+        }
     }
 }

Source/Editor/Managed/ManagedEditor.Internal.cpp

@@ -509,6 +509,21 @@ DEFINE_INTERNAL_CALL(bool) EditorInternal_CanSetToRoot(Prefab* prefab, Actor* ta
     return true;
 }
 
+DEFINE_INTERNAL_CALL(void) EditorInternal_GetPrefabNestedObject(Guid* prefabId, Guid* prefabObjectId, Guid* outPrefabId, Guid* outPrefabObjectId)
+{
+    *outPrefabId = Guid::Empty;
+    *outPrefabObjectId = Guid::Empty;
+    const auto prefab = Content::Load<Prefab>(*prefabId);
+    if (!prefab)
+        return;
+    const ISerializable::DeserializeStream** prefabObjectDataPtr = prefab->ObjectsDataCache.TryGet(*prefabObjectId);
+    if (!prefabObjectDataPtr)
+        return;
+    const ISerializable::DeserializeStream& prefabObjectData = **prefabObjectDataPtr;
+    JsonTools::GetGuidIfValid(*outPrefabId, prefabObjectData, "PrefabID");
+    JsonTools::GetGuidIfValid(*outPrefabObjectId, prefabObjectData, "PrefabObjectID");
+}
+
 DEFINE_INTERNAL_CALL(float) EditorInternal_GetAnimationTime(AnimatedModel* animatedModel)
 {
     return animatedModel && animatedModel->GraphInstance.State.Count() == 1 ? animatedModel->GraphInstance.State[0].Animation.TimePosition : 0.0f;

Source/Editor/Managed/ManagedEditor.cpp

@@ -278,13 +278,7 @@ void ManagedEditor::Update()
 void ManagedEditor::Exit()
 {
     if (WasExitCalled)
-    {
-        // Ups xD
-        LOG(Warning, "Managed Editor exit called after exit or before init.");
         return;
-    }
-
-    // Set flag
     WasExitCalled = true;
 
     // Skip if managed object is missing

Source/Editor/Modules/PrefabsModule.cs

@@ -225,8 +225,15 @@ namespace FlaxEditor.Modules
                 throw new ArgumentException("Missing prefab to apply.");
             PrefabApplying?.Invoke(prefab, instance);
 
+            // When applying changes to prefab from actor in level ignore it's root transformation (see ActorEditor.ProcessDiff)
+            var originalTransform = instance.LocalTransform;
+            if (instance.IsPrefabRoot && instance.Scene != null)
+                instance.LocalTransform = prefab.GetDefaultInstance().Transform;
+
             // Call backend
-            if (PrefabManager.Internal_ApplyAll(FlaxEngine.Object.GetUnmanagedPtr(instance)))
+            var failed = PrefabManager.Internal_ApplyAll(FlaxEngine.Object.GetUnmanagedPtr(instance));
+            instance.LocalTransform = originalTransform;
+            if (failed)
                 throw new Exception("Failed to apply the prefab. See log to learn more.");
 
             PrefabApplied?.Invoke(prefab, instance);

Source/Editor/Modules/SceneEditingModule.cs

@@ -60,13 +60,26 @@ namespace FlaxEditor.Modules
         {
         }
 
+        private void BulkScenesSelectUpdate(bool select = true)
+        {
+            // Blank list deselects all
+            Select(select ? Editor.Scene.Root.ChildNodes : new List<SceneGraphNode>());
+        }
+
         /// <summary>
         /// Selects all scenes.
         /// </summary>
         public void SelectAllScenes()
         {
-            // Select all scenes (linked to the root node)
+            BulkScenesSelectUpdate(true);
-            Select(Editor.Scene.Root.ChildNodes);
+        }
+
+        /// <summary>
+        /// Deselects all scenes.
+        /// </summary>
+        public void DeselectAllScenes()
+        {
+            BulkScenesSelectUpdate(false);
         }
 
         /// <summary>
@@ -320,7 +333,7 @@ namespace FlaxEditor.Modules
             actorNode.PostSpawn();
 
             // Create undo action
-            IUndoAction action = new DeleteActorsAction(new List<SceneGraphNode>(1) { actorNode }, true);
+            IUndoAction action = new DeleteActorsAction(actorNode, true);
             if (autoSelect)
             {
                 var before = Selection.ToArray();

Source/Editor/Modules/SceneModule.cs

@@ -6,6 +6,7 @@ using System.IO;
 using FlaxEditor.SceneGraph;
 using FlaxEditor.SceneGraph.Actors;
 using FlaxEngine;
+using FlaxEngine.GUI;
 using Object = FlaxEngine.Object;
 
 namespace FlaxEditor.Modules
@@ -454,6 +455,41 @@ namespace FlaxEditor.Modules
             Profiler.EndEvent();
         }
 
+        private Dictionary<ContainerControl, Float2> _uiRootSizes;
+
+        internal void OnSaveStart(ContainerControl uiRoot)
+        {
+            // Force viewport UI to have fixed size during scene/prefabs saving to result in stable data (less mess in version control diffs)
+            if (_uiRootSizes == null)
+                _uiRootSizes = new Dictionary<ContainerControl, Float2>();
+            _uiRootSizes[uiRoot] = uiRoot.Size;
+            uiRoot.Size = new Float2(1920, 1080);
+        }
+
+        internal void OnSaveEnd(ContainerControl uiRoot)
+        {
+            // Restore cached size of the UI root container
+            if (_uiRootSizes != null && _uiRootSizes.Remove(uiRoot, out var size))
+            {
+                uiRoot.Size = size;
+            }
+        }
+
+        private void OnSceneSaving(Scene scene, Guid sceneId)
+        {
+            OnSaveStart(RootControl.GameRoot);
+        }
+        
+        private void OnSceneSaved(Scene scene, Guid sceneId)
+        {
+            OnSaveEnd(RootControl.GameRoot);
+        }
+        
+        private void OnSceneSaveError(Scene scene, Guid sceneId)
+        {
+            OnSaveEnd(RootControl.GameRoot);
+        }
+
         private void OnSceneLoaded(Scene scene, Guid sceneId)
         {
             var startTime = DateTime.UtcNow;
@@ -659,6 +695,9 @@ namespace FlaxEditor.Modules
             Root = new ScenesRootNode();
 
             // Bind events
+            Level.SceneSaving += OnSceneSaving;
+            Level.SceneSaved += OnSceneSaved;
+            Level.SceneSaveError += OnSceneSaveError;
             Level.SceneLoaded += OnSceneLoaded;
             Level.SceneUnloading += OnSceneUnloading;
             Level.ActorSpawned += OnActorSpawned;
@@ -673,6 +712,9 @@ namespace FlaxEditor.Modules
         public override void OnExit()
         {
             // Unbind events
+            Level.SceneSaving -= OnSceneSaving;
+            Level.SceneSaved -= OnSceneSaved;
+            Level.SceneSaveError -= OnSceneSaveError;
             Level.SceneLoaded -= OnSceneLoaded;
             Level.SceneUnloading -= OnSceneUnloading;
             Level.ActorSpawned -= OnActorSpawned;

Source/Editor/Modules/SimulationModule.cs

@@ -264,11 +264,14 @@ namespace FlaxEditor.Modules
                 _enterPlayFocusedWindow = gameWin;
 
             // Show Game widow if hidden
-            if (gameWin != null && gameWin.FocusOnPlay)
+            if (gameWin != null)
             {
-                gameWin.FocusGameViewport();
+                if (gameWin.FocusOnPlay)
+                    gameWin.FocusGameViewport();
+                gameWin.SetWindowMode(Editor.Options.Options.Interface.DefaultGameWindowMode);
             }
 
+
             Editor.Log("[PlayMode] Enter");
         }
 

Source/Editor/Modules/UIModule.cs

@@ -54,6 +54,7 @@ namespace FlaxEditor.Modules
         private ContextMenuButton _menuEditDelete;
         private ContextMenuButton _menuEditDuplicate;
         private ContextMenuButton _menuEditSelectAll;
+        private ContextMenuButton _menuEditDeselectAll;
         private ContextMenuButton _menuEditFind;
         private ContextMenuButton _menuSceneMoveActorToViewport;
         private ContextMenuButton _menuSceneAlignActorWithViewport;
@@ -554,6 +555,7 @@ namespace FlaxEditor.Modules
             _menuEditDuplicate = cm.AddButton("Duplicate", inputOptions.Duplicate, Editor.SceneEditing.Duplicate);
             cm.AddSeparator();
             _menuEditSelectAll = cm.AddButton("Select all", inputOptions.SelectAll, Editor.SceneEditing.SelectAllScenes);
+            _menuEditDeselectAll = cm.AddButton("Deselect all", inputOptions.DeselectAll, Editor.SceneEditing.DeselectAllScenes);
             _menuCreateParentForSelectedActors = cm.AddButton("Create parent for selected actors", Editor.SceneEditing.CreateParentForSelectedActors);
             _menuEditFind = cm.AddButton("Find", inputOptions.Search, Editor.Windows.SceneWin.Search);
             cm.AddSeparator();
@@ -673,6 +675,7 @@ namespace FlaxEditor.Modules
             _menuEditDelete.ShortKeys = inputOptions.Delete.ToString();
             _menuEditDuplicate.ShortKeys = inputOptions.Duplicate.ToString();
             _menuEditSelectAll.ShortKeys = inputOptions.SelectAll.ToString();
+            _menuEditDeselectAll.ShortKeys = inputOptions.DeselectAll.ToString();
             _menuEditFind.ShortKeys = inputOptions.Search.ToString();
             _menuGamePlayGame.ShortKeys = inputOptions.Play.ToString();
             _menuGamePlayCurrentScenes.ShortKeys = inputOptions.PlayCurrentScenes.ToString();
@@ -739,6 +742,17 @@ namespace FlaxEditor.Modules
             playActionGroup.SelectedChanged = SetPlayAction;
             Editor.Options.OptionsChanged += options => { playActionGroup.Selected = options.Interface.PlayButtonAction; };
 
+            var windowModesGroup = new ContextMenuSingleSelectGroup<InterfaceOptions.GameWindowMode>();
+            var windowTypeMenu = _toolStripPlay.ContextMenu.AddChildMenu("Game window mode");
+            windowModesGroup.AddItem("Docked", InterfaceOptions.GameWindowMode.Docked, null, "Shows the game window docked, inside the editor");
+            windowModesGroup.AddItem("Popup", InterfaceOptions.GameWindowMode.PopupWindow, null, "Shows the game window as a popup");
+            windowModesGroup.AddItem("Maximized", InterfaceOptions.GameWindowMode.MaximizedWindow, null, "Shows the game window maximized (Same as pressing F11)");
+            windowModesGroup.AddItem("Borderless", InterfaceOptions.GameWindowMode.BorderlessWindow, null, "Shows the game window borderless");
+            windowModesGroup.AddItemsToContextMenu(windowTypeMenu.ContextMenu);
+            windowModesGroup.Selected = Editor.Options.Options.Interface.DefaultGameWindowMode;
+            windowModesGroup.SelectedChanged = SetGameWindowMode;
+            Editor.Options.OptionsChanged += options => { windowModesGroup.Selected = options.Interface.DefaultGameWindowMode; };
+
             _toolStripPause = (ToolStripButton)ToolStrip.AddButton(Editor.Icons.Pause64, Editor.Simulation.RequestResumeOrPause).LinkTooltip($"Pause/Resume game ({inputOptions.Pause})");
             _toolStripStep = (ToolStripButton)ToolStrip.AddButton(Editor.Icons.Skip64, Editor.Simulation.RequestPlayOneFrame).LinkTooltip("Step one frame in game");
 
@@ -871,6 +885,7 @@ namespace FlaxEditor.Modules
             _menuEditDelete.Enabled = hasSthSelected;
             _menuEditDuplicate.Enabled = hasSthSelected;
             _menuEditSelectAll.Enabled = Level.IsAnySceneLoaded;
+            _menuEditDeselectAll.Enabled = hasSthSelected;
 
             control.PerformLayout();
         }
@@ -1043,6 +1058,13 @@ namespace FlaxEditor.Modules
             Editor.Options.Apply(options);
         }
 
+        private void SetGameWindowMode(InterfaceOptions.GameWindowMode newGameWindowMode)
+        {
+            var options = Editor.Options.Options;
+            options.Interface.DefaultGameWindowMode = newGameWindowMode;
+            Editor.Options.Apply(options);
+        }
+
         private void OnMainWindowClosing()
         {
             // Clear UI references (GUI cannot be used after window closing)

Source/Editor/Options/InputOptions.cs

@@ -56,6 +56,10 @@ namespace FlaxEditor.Options
         [EditorDisplay("Common"), EditorOrder(190)]
         public InputBinding SelectAll = new InputBinding(KeyboardKeys.A, KeyboardKeys.Control);
 
+        [DefaultValue(typeof(InputBinding), "Ctrl+Shift+A")]
+        [EditorDisplay("Common"), EditorOrder(195)]
+        public InputBinding DeselectAll = new InputBinding(KeyboardKeys.A, KeyboardKeys.Shift, KeyboardKeys.Control);
+
         [DefaultValue(typeof(InputBinding), "F")]
         [EditorDisplay("Common"), EditorOrder(200)]
         public InputBinding FocusSelection = new InputBinding(KeyboardKeys.F);

Source/Editor/Options/InterfaceOptions.cs

@@ -90,6 +90,32 @@ namespace FlaxEditor.Options
             PlayScenes,
         }
 
+        /// <summary>
+        /// Available window modes for the game window.
+        /// </summary>
+        public enum GameWindowMode
+        {
+            /// <summary>
+            /// Shows the game window docked, inside the editor.
+            /// </summary>
+            Docked,
+
+            /// <summary>
+            /// Shows the game window as a popup.
+            /// </summary>
+            PopupWindow,
+
+            /// <summary>
+            /// Shows the game window maximized. (Same as pressing F11)
+            /// </summary>
+            MaximizedWindow,
+
+            /// <summary>
+            /// Shows the game window borderless.
+            /// </summary>
+            BorderlessWindow,
+        }
+
         /// <summary>
         /// Gets or sets the Editor User Interface scale. Applied to all UI elements, windows and text. Can be used to scale the interface up on a bigger display. Editor restart required.
         /// </summary>
@@ -229,6 +255,13 @@ namespace FlaxEditor.Options
         [EditorDisplay("Play In-Editor", "Play Button Action"), EditorOrder(410)]
         public PlayAction PlayButtonAction { get; set; } = PlayAction.PlayScenes;
 
+        /// <summary>
+        /// Gets or sets a value indicating how the game window should be displayed when the game is launched.
+        /// </summary>
+        [DefaultValue(GameWindowMode.Docked)]
+        [EditorDisplay("Play In-Editor", "Game Window Mode"), EditorOrder(420), Tooltip("Determines how the game window is displayed when the game is launched.")]
+        public GameWindowMode DefaultGameWindowMode { get; set; } = GameWindowMode.Docked;
+
         /// <summary>
         /// Gets or sets a value indicating the number of game clients to launch when building and/or running cooked game.
         /// </summary>

Source/Editor/Options/OptionsModule.cs

@@ -212,6 +212,14 @@ namespace FlaxEditor.Options
             string styleName = themeOptions.SelectedStyle;
             if (styleName != ThemeOptions.DefaultName && styleName != ThemeOptions.LightDefault && themeOptions.Styles.TryGetValue(styleName, out var style) && style != null)
             {
+                // Setup defaults for newly added components that might be missing
+                if (style.Selection == Color.Transparent && style.SelectionBorder == Color.Transparent)
+                {
+                    // [Deprecated on 6.03.2024, expires on 6.03.2026]
+                    style.Selection = Color.Orange * 0.4f;
+                    style.SelectionBorder = Color.Orange;
+                }
+
                 Style.Current = style;
             }
             else
@@ -258,6 +266,8 @@ namespace FlaxEditor.Options
                 TextBoxBackgroundSelected = Color.FromBgra(0xFF3F3F46),
                 CollectionBackgroundColor = Color.FromBgra(0x14CCCCCC),
                 ProgressNormal = Color.FromBgra(0xFF0ad328),
+                Selection = Color.Orange * 0.4f,
+                SelectionBorder = Color.Orange,
 
                 Statusbar = new Style.StatusbarStyle
                 {
@@ -318,6 +328,8 @@ namespace FlaxEditor.Options
                 TextBoxBackgroundSelected = new Color(0.73f, 0.73f, 0.80f, 1f),
                 CollectionBackgroundColor = new Color(0.85f, 0.85f, 0.88f, 1f),
                 ProgressNormal = new Color(0.03f, 0.65f, 0.12f, 1f),
+                Selection = Color.Orange * 0.4f,
+                SelectionBorder = Color.Orange,
 
                 // Fonts
                 FontTitle = options.Interface.TitleFont.GetFont(),

Source/Editor/SceneGraph/ActorNode.cs

@@ -316,41 +316,7 @@ namespace FlaxEditor.SceneGraph
         {
             base.OnParentChanged();
 
-            // Update UI (special case if actor is spawned and added to existing scene tree)
+            _treeNode.OnParentChanged(_actor, parentNode as ActorNode);
-            var parentTreeNode = (parentNode as ActorNode)?.TreeNode;
-            if (parentTreeNode != null && !parentTreeNode.IsLayoutLocked)
-            {
-                parentTreeNode.IsLayoutLocked = true;
-                _treeNode.Parent = parentTreeNode;
-                _treeNode.IndexInParent = _actor.OrderInParent;
-                parentTreeNode.IsLayoutLocked = false;
-
-                // Skip UI update if node won't be in a view
-                if (parentTreeNode.IsCollapsed)
-                {
-                    TreeNode.UnlockChildrenRecursive();
-                }
-                else
-                {
-                    // Try to perform layout at the level where it makes it the most performant (the least computations)
-                    var tree = parentTreeNode.ParentTree;
-                    if (tree != null)
-                    {
-                        if (tree.Parent is FlaxEngine.GUI.Panel treeParent)
-                            treeParent.PerformLayout();
-                        else
-                            tree.PerformLayout();
-                    }
-                    else
-                    {
-                        parentTreeNode.PerformLayout();
-                    }
-                }
-            }
-            else
-            {
-                _treeNode.Parent = parentTreeNode;
-            }
         }
 
         /// <inheritdoc />

Source/Editor/SceneGraph/Actors/StaticModelNode.cs

@@ -1,5 +1,11 @@
 // Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
 
+#if USE_LARGE_WORLDS
+using Real = System.Double;
+#else
+using Real = System.Single;
+#endif
+
 using System;
 using System.Collections.Generic;
 using FlaxEditor.Content;
@@ -25,18 +31,20 @@ namespace FlaxEditor.SceneGraph.Actors
         }
 
         /// <inheritdoc />
-        public override bool OnVertexSnap(ref Vector3 point, out Vector3 result)
+        public override bool OnVertexSnap(ref Ray ray, Real hitDistance, out Vector3 result)
         {
-            result = point;
+            // Find the closest vertex to bounding box point (collision detection approximation)
+            result = ray.GetPoint(hitDistance);
             var model = ((StaticModel)Actor).Model;
             if (model && !model.WaitForLoaded())
             {
                 // TODO: move to C++ and use cached vertex buffer internally inside the Mesh
                 if (_vertices == null)
                     _vertices = new();
-                var pointLocal = (Float3)Actor.Transform.WorldToLocal(point);
+                var pointLocal = (Float3)Actor.Transform.WorldToLocal(result);
-                var minDistance = float.MaxValue;
+                var minDistance = Real.MaxValue;
-                foreach (var lod in model.LODs)
+                var lodIndex = 0; // TODO: use LOD index based on the game view
+                var lod = model.LODs[lodIndex];
                 {
                     var hit = false;
                     foreach (var mesh in lod.Meshes)

Source/Editor/SceneGraph/GUI/ActorTreeNode.cs

@@ -3,6 +3,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using FlaxEditor.Actions;
 using FlaxEditor.Content;
 using FlaxEditor.GUI;
 using FlaxEditor.GUI.Drag;
@@ -14,7 +15,6 @@ using FlaxEditor.Windows.Assets;
 using FlaxEngine;
 using FlaxEngine.GUI;
 using FlaxEngine.Utilities;
-using Object = FlaxEngine.Object;
 
 namespace FlaxEditor.SceneGraph.GUI
 {
@@ -82,8 +82,51 @@ namespace FlaxEditor.SceneGraph.GUI
             UpdateText();
         }
 
+        internal void OnParentChanged(Actor actor, ActorNode parentNode)
+        {
+            // Update cached value
+            _orderInParent = actor.OrderInParent;
+
+            // Update UI (special case if actor is spawned and added to existing scene tree)
+            var parentTreeNode = parentNode?.TreeNode;
+            if (parentTreeNode != null && !parentTreeNode.IsLayoutLocked)
+            {
+                parentTreeNode.IsLayoutLocked = true;
+                Parent = parentTreeNode;
+                IndexInParent = _orderInParent;
+                parentTreeNode.IsLayoutLocked = false;
+
+                // Skip UI update if node won't be in a view
+                if (parentTreeNode.IsCollapsed)
+                {
+                    UnlockChildrenRecursive();
+                }
+                else
+                {
+                    // Try to perform layout at the level where it makes it the most performant (the least computations)
+                    var tree = parentTreeNode.ParentTree;
+                    if (tree != null)
+                    {
+                        if (tree.Parent is Panel treeParent)
+                            treeParent.PerformLayout();
+                        else
+                            tree.PerformLayout();
+                    }
+                    else
+                    {
+                        parentTreeNode.PerformLayout();
+                    }
+                }
+            }
+            else
+            {
+                Parent = parentTreeNode;
+            }
+        }
+
         internal void OnOrderInParentChanged()
         {
+            // Use cached value to check if we need to update UI layout (and update siblings order at once)
             if (Parent is ActorTreeNode parent)
             {
                 var anyChanged = false;
@@ -419,134 +462,6 @@ namespace FlaxEditor.SceneGraph.GUI
             _dragHandlers.OnDragLeave();
         }
 
-        [Serializable]
-        private class ReparentAction : IUndoAction
-        {
-            [Serialize]
-            private Guid[] _ids;
-
-            [Serialize]
-            private int _actorsCount;
-
-            [Serialize]
-            private Guid[] _prefabIds;
-
-            [Serialize]
-            private Guid[] _prefabObjectIds;
-
-            public ReparentAction(Actor actor)
-            : this(new List<Actor> { actor })
-            {
-            }
-
-            public ReparentAction(List<Actor> actors)
-            {
-                var allActors = new List<Actor>(Mathf.NextPowerOfTwo(actors.Count));
-
-                for (int i = 0; i < actors.Count; i++)
-                {
-                    GetAllActors(allActors, actors[i]);
-                }
-
-                var allScripts = new List<Script>(allActors.Capacity);
-                GetAllScripts(allActors, allScripts);
-
-                int allCount = allActors.Count + allScripts.Count;
-                _actorsCount = allActors.Count;
-                _ids = new Guid[allCount];
-                _prefabIds = new Guid[allCount];
-                _prefabObjectIds = new Guid[allCount];
-
-                for (int i = 0; i < allActors.Count; i++)
-                {
-                    _ids[i] = allActors[i].ID;
-                    _prefabIds[i] = allActors[i].PrefabID;
-                    _prefabObjectIds[i] = allActors[i].PrefabObjectID;
-                }
-
-                for (int i = 0; i < allScripts.Count; i++)
-                {
-                    int j = _actorsCount + i;
-                    _ids[j] = allScripts[i].ID;
-                    _prefabIds[j] = allScripts[i].PrefabID;
-                    _prefabObjectIds[j] = allScripts[i].PrefabObjectID;
-                }
-            }
-
-            public ReparentAction(Script script)
-            {
-                _actorsCount = 0;
-                _ids = new Guid[] { script.ID };
-                _prefabIds = new Guid[] { script.PrefabID };
-                _prefabObjectIds = new Guid[] { script.PrefabObjectID };
-            }
-
-            private void GetAllActors(List<Actor> allActors, Actor actor)
-            {
-                allActors.Add(actor);
-
-                for (int i = 0; i < actor.ChildrenCount; i++)
-                {
-                    var child = actor.GetChild(i);
-                    if (!allActors.Contains(child))
-                    {
-                        GetAllActors(allActors, child);
-                    }
-                }
-            }
-
-            private void GetAllScripts(List<Actor> allActors, List<Script> allScripts)
-            {
-                for (int i = 0; i < allActors.Count; i++)
-                {
-                    var actor = allActors[i];
-                    for (int j = 0; j < actor.ScriptsCount; j++)
-                    {
-                        allScripts.Add(actor.GetScript(j));
-                    }
-                }
-            }
-
-            /// <inheritdoc />
-            public string ActionString => string.Empty;
-
-            /// <inheritdoc />
-            public void Do()
-            {
-                // Note: prefab links are broken by the C++ backend on actor reparenting
-            }
-
-            /// <inheritdoc />
-            public void Undo()
-            {
-                // Restore links
-                for (int i = 0; i < _actorsCount; i++)
-                {
-                    var actor = Object.Find<Actor>(ref _ids[i]);
-                    if (actor != null && _prefabIds[i] != Guid.Empty)
-                    {
-                        Actor.Internal_LinkPrefab(Object.GetUnmanagedPtr(actor), ref _prefabIds[i], ref _prefabObjectIds[i]);
-                    }
-                }
-                for (int i = _actorsCount; i < _ids.Length; i++)
-                {
-                    var script = Object.Find<Script>(ref _ids[i]);
-                    if (script != null && _prefabIds[i] != Guid.Empty)
-                    {
-                        Script.Internal_LinkPrefab(Object.GetUnmanagedPtr(script), ref _prefabIds[i], ref _prefabObjectIds[i]);
-                    }
-                }
-            }
-
-            /// <inheritdoc />
-            public void Dispose()
-            {
-                _ids = null;
-                _prefabIds = null;
-                _prefabObjectIds = null;
-            }
-        }
-
         /// <inheritdoc />
         protected override DragDropEffect OnDragDropHeader(DragData data)
         {
@@ -593,46 +508,24 @@ namespace FlaxEditor.SceneGraph.GUI
             // Drag actors
             if (_dragActors != null && _dragActors.HasValidDrag)
             {
-                bool worldPositionLock = Root.GetKey(KeyboardKeys.Control) == false;
+                bool worldPositionsStays = Root.GetKey(KeyboardKeys.Control) == false;
-                var singleObject = _dragActors.Objects.Count == 1;
+                var objects = new SceneObject[_dragActors.Objects.Count];
-                if (singleObject)
+                for (int i = 0; i < objects.Length; i++)
-                {
+                    objects[i] = _dragActors.Objects[i].Actor;
-                    var targetActor = _dragActors.Objects[0].Actor;
+                var action = new ParentActorsAction(objects, newParent, newOrder, worldPositionsStays);
-                    var customAction = targetActor.HasPrefabLink ? new ReparentAction(targetActor) : null;
+                ActorNode.Root.Undo?.AddAction(action);
-                    using (new UndoBlock(ActorNode.Root.Undo, targetActor, "Change actor parent", customAction))
+                action.Do();
-                    {
-                        targetActor.SetParent(newParent, worldPositionLock, true);
-                        targetActor.OrderInParent = newOrder;
-                    }
-                }
-                else
-                {
-                    var targetActors = _dragActors.Objects.ConvertAll(x => x.Actor);
-                    var customAction = targetActors.Any(x => x.HasPrefabLink) ? new ReparentAction(targetActors) : null;
-                    using (new UndoMultiBlock(ActorNode.Root.Undo, targetActors, "Change actors parent", customAction))
-                    {
-                        for (int i = 0; i < targetActors.Count; i++)
-                        {
-                            var targetActor = targetActors[i];
-                            targetActor.SetParent(newParent, worldPositionLock, true);
-                            targetActor.OrderInParent = newOrder;
-                        }
-                    }
-                }
-
                 result = DragDropEffect.Move;
             }
             // Drag scripts
             else if (_dragScripts != null && _dragScripts.HasValidDrag)
             {
-                foreach (var script in _dragScripts.Objects)
+                var objects = new SceneObject[_dragScripts.Objects.Count];
-                {
+                for (int i = 0; i < objects.Length; i++)
-                    var customAction = script.HasPrefabLink ? new ReparentAction(script) : null;
+                    objects[i] = _dragScripts.Objects[i];
-                    using (new UndoBlock(ActorNode.Root.Undo, script, "Change script parent", customAction))
+                var action = new ParentActorsAction(objects, newParent, newOrder);
-                    {
+                ActorNode.Root.Undo?.AddAction(action);
-                        script.SetParent(newParent, true);
+                action.Do();
-                    }
-                }
                 Select();
                 result = DragDropEffect.Move;
             }

Source/Editor/SceneGraph/SceneGraphNode.cs

@@ -41,7 +41,11 @@ namespace FlaxEditor.SceneGraph
         protected SceneGraphNode(Guid id)
         {
             ID = id;
-            SceneGraphFactory.Nodes.Add(id, this);
+            if (SceneGraphFactory.Nodes.TryGetValue(id, out var duplicate) && duplicate != null)
+            {
+                Editor.LogWarning($"Duplicated Scene Graph node with ID {FlaxEngine.Json.JsonSerializer.GetStringID(id)} of type '{duplicate.GetType().FullName}'");
+            }
+            SceneGraphFactory.Nodes[id] = this;
         }
 
         /// <summary>
@@ -94,18 +98,6 @@ namespace FlaxEditor.SceneGraph
         /// </summary>
         public virtual bool CanTransform => true;
 
-        /// <summary>
-        /// Gets a value indicating whether this node can be used for the vertex snapping feature.
-        /// </summary>
-        public bool CanVertexSnap
-        {
-            get
-            {
-                var v = Vector3.Zero;
-                return OnVertexSnap(ref v, out _);
-            }
-        }
-
         /// <summary>
         /// Gets a value indicating whether this <see cref="SceneGraphNode"/> is active.
         /// </summary>
@@ -365,14 +357,15 @@ namespace FlaxEditor.SceneGraph
         }
 
         /// <summary>
-        /// Performs the vertex snapping of a given point on the object surface that is closest to a given location.
+        /// Performs the vertex snapping for a given ray and hitDistance.
         /// </summary>
-        /// <param name="point">The position to snap.</param>
+        /// <param name="ray">The ray to raycast.</param>
+        /// <param name="hitDistance">Hit distance from ray to object bounding box.</param>
         /// <param name="result">The result point on the object mesh that is closest to the specified location.</param>
         /// <returns>True if got a valid result value, otherwise false (eg. if missing data or not initialized).</returns>
-        public virtual bool OnVertexSnap(ref Vector3 point, out Vector3 result)
+        public virtual bool OnVertexSnap(ref Ray ray, Real hitDistance, out Vector3 result)
         {
-            result = point;
+            result = Vector3.Zero;
             return false;
         }
 

Source/Editor/SceneGraph/SceneGraphTools.cs

@@ -92,11 +92,12 @@ namespace FlaxEditor.SceneGraph
 
         private static void FillTree(SceneGraphNode node, List<SceneGraphNode> result)
         {
-            result.AddRange(node.ChildNodes);
+            if (result.Contains(node))
-            for (int i = 0; i < node.ChildNodes.Count; i++)
+                return;
-            {
+            result.Add(node);
-                FillTree(node.ChildNodes[i], result);
+            var children = node.ChildNodes;
-            }
+            for (int i = 0; i < children.Count; i++)
+                FillTree(children[i], result);
         }
 
         /// <summary>
@@ -109,21 +110,9 @@ namespace FlaxEditor.SceneGraph
         {
             if (nodes == null || result == null)
                 throw new ArgumentNullException();
-
             result.Clear();
-
             for (var i = 0; i < nodes.Count; i++)
-            {
+                FillTree(nodes[i], result);
-                var target = nodes[i];
-
-                // Check if has been already added
-                if (result.Contains(target))
-                    continue;
-
-                // Add whole child tree to the results
-                result.Add(target);
-                FillTree(target, result);
-            }
         }
 
         /// <summary>
@@ -150,7 +139,6 @@ namespace FlaxEditor.SceneGraph
             if (node == null || result == null)
                 throw new ArgumentNullException();
             result.Clear();
-            result.Add(node);
             FillTree(node, result);
         }
     }

Source/Editor/Surface/Archetypes/Animation.MultiBlend.cs

@@ -602,7 +602,7 @@ namespace FlaxEditor.Surface.Archetypes
                         var dataB = (Guid)_node.Values[5 + i * 2];
 
                         pointsAnims[i] = dataB;
-                        pointsLocations[i] = new Float2(dataA.X, 0.0f);
+                        pointsLocations[i] = new Float2(Mathf.Clamp(dataA.X, rangeX.X, rangeX.Y), 0.0f);
                     }
                 }
 
@@ -681,6 +681,9 @@ namespace FlaxEditor.Surface.Archetypes
                 {
                     _animationX.Value = 0.0f;
                 }
+                var ranges = (Float4)Values[0];
+                _animationX.MinValue = ranges.X;
+                _animationX.MaxValue = ranges.Y;
                 _animationXLabel.Enabled = isValid;
                 _animationX.Enabled = isValid;
             }
@@ -732,7 +735,7 @@ namespace FlaxEditor.Surface.Archetypes
                         var dataB = (Guid)_node.Values[5 + i * 2];
 
                         pointsAnims[i] = dataB;
-                        pointsLocations[i] = new Float2(dataA.X, dataA.Y);
+                        pointsLocations[i] = new Float2(Mathf.Clamp(dataA.X, rangeX.X, rangeX.Y), Mathf.Clamp(dataA.Y, rangeY.X, rangeY.Y));
                     }
                 }
 
@@ -843,6 +846,11 @@ namespace FlaxEditor.Surface.Archetypes
                     _animationX.Value = 0.0f;
                     _animationY.Value = 0.0f;
                 }
+                var ranges = (Float4)Values[0];
+                _animationX.MinValue = ranges.X;
+                _animationX.MaxValue = ranges.Y;
+                _animationY.MinValue = ranges.Z;
+                _animationY.MaxValue = ranges.W;
                 _animationXLabel.Enabled = isValid;
                 _animationX.Enabled = isValid;
                 _animationYLabel.Enabled = isValid;

Source/Editor/Surface/Archetypes/Animation.StateMachine.cs

@@ -350,7 +350,7 @@ namespace FlaxEditor.Surface.Archetypes
 
                 // Paint Background
                 if (_isSelected)
-                    Render2D.DrawRectangle(_textRect, Color.Orange);
+                    Render2D.DrawRectangle(_textRect, style.SelectionBorder);
 
                 BackgroundColor = style.BackgroundNormal;
                 var dragAreaColor = BackgroundColor / 2.0f;
@@ -1078,7 +1078,7 @@ namespace FlaxEditor.Surface.Archetypes
 
                 // Paint Background
                 if (_isSelected)
-                    Render2D.DrawRectangle(_textRect, Color.Orange);
+                    Render2D.DrawRectangle(_textRect, style.SelectionBorder);
 
                 BackgroundColor = style.BackgroundNormal;
                 var dragAreaColor = BackgroundColor / 2.0f;

Source/Editor/Surface/Archetypes/Math.cs

@@ -239,6 +239,7 @@ namespace FlaxEditor.Surface.Archetypes
                 ConnectionsHints = ConnectionsHint.Numeric,
                 IndependentBoxes = new[] { 0, 1, 2 },
                 DependentBoxes = new[] { 3 },
+                SortScore = -1, // Lower sort score to not go above Multiply node
                 DefaultValues = new object[]
                 {
                     1.0f,

Source/Editor/Surface/Archetypes/ParticleModules.cs

@@ -128,7 +128,7 @@ namespace FlaxEditor.Surface.Archetypes
                 Render2D.DrawSprite(Editor.Instance.Icons.DragBar12, _arrangeButtonRect, _arrangeButtonInUse ? Color.Orange : dragBarColor);
                 if (_arrangeButtonInUse && ArrangeAreaCheck(out _, out var arrangeTargetRect))
                 {
-                    Render2D.FillRectangle(arrangeTargetRect, Color.Orange * 0.8f);
+                    Render2D.FillRectangle(arrangeTargetRect, style.Selection);
                 }
 
                 // Disabled overlay

Source/Editor/Surface/ContextMenu/VisjectCM.cs

@@ -583,7 +583,7 @@ namespace FlaxEditor.Surface.ContextMenu
 
             // Check if surface has any parameters
             var parameters = _parametersGetter?.Invoke();
-            int count = parameters?.Count(x => x.IsPublic) ?? 0;
+            int count = parameters?.Count ?? 0;
             if (count > 0)
             {
                 // TODO: cache the allocated memory to reduce dynamic allocations
@@ -592,28 +592,6 @@ namespace FlaxEditor.Surface.ContextMenu
                 var archetypes = new NodeArchetype[count];
                 int archetypeIndex = 0;
 
-                // ReSharper disable once PossibleNullReferenceException
-                for (int i = 0; i < parameters.Count; i++)
-                {
-                    var param = parameters[i];
-                    if (!param.IsPublic)
-                        continue;
-
-                    var node = (NodeArchetype)_parameterGetNodeArchetype.Clone();
-                    node.Title = "Get " + param.Name;
-                    node.DefaultValues[0] = param.ID;
-                    archetypes[archetypeIndex++] = node;
-
-                    if (_parameterSetNodeArchetype != null)
-                    {
-                        node = (NodeArchetype)_parameterSetNodeArchetype.Clone();
-                        node.Title = "Set " + param.Name;
-                        node.DefaultValues[0] = param.ID;
-                        node.DefaultValues[1] = TypeUtils.GetDefaultValue(param.Type);
-                        archetypes[archetypeIndex++] = node;
-                    }
-                }
-
                 var groupArchetype = new GroupArchetype
                 {
                     GroupID = 6,
@@ -626,26 +604,39 @@ namespace FlaxEditor.Surface.ContextMenu
                 group.ArrowImageOpened = new SpriteBrush(Style.Current.ArrowDown);
                 group.ArrowImageClosed = new SpriteBrush(Style.Current.ArrowRight);
                 group.Close(false);
-                archetypeIndex = 0;
+
+                // ReSharper disable once PossibleNullReferenceException
                 for (int i = 0; i < parameters.Count; i++)
                 {
                     var param = parameters[i];
-                    if (!param.IsPublic)
-                        continue;
 
-                    var item = new VisjectCMItem(group, groupArchetype, archetypes[archetypeIndex++])
+                    // Define Getter node and create CM item
+                    var node = (NodeArchetype)_parameterGetNodeArchetype.Clone();
+                    node.Title = "Get " + param.Name;
+                    node.DefaultValues[0] = param.ID;
+                    archetypes[archetypeIndex++] = node;
+
+                    var item = new VisjectCMItem(group, groupArchetype, node)
                     {
                         Parent = group
                     };
 
+                    // Define Setter node and create CM item if parameter has a setter
                     if (_parameterSetNodeArchetype != null)
                     {
-                        item = new VisjectCMItem(group, groupArchetype, archetypes[archetypeIndex++])
+                        node = (NodeArchetype)_parameterSetNodeArchetype.Clone();
+                        node.Title = "Set " + param.Name;
+                        node.DefaultValues[0] = param.ID;
+                        node.DefaultValues[1] = TypeUtils.GetDefaultValue(param.Type);
+                        archetypes[archetypeIndex++] = node;
+
+                        item = new VisjectCMItem(group, groupArchetype, node)
                         {
                             Parent = group
                         };
                     }
                 }
+
                 group.SortChildren();
                 group.UnlockChildrenRecursive();
                 group.Parent = _groupsPanel;

Source/Editor/Surface/SurfaceComment.cs

@@ -181,7 +181,8 @@ namespace FlaxEditor.Surface
             if (_isResizing)
             {
                 // Draw overlay
-                Render2D.FillRectangle(_resizeButtonRect, Color.Orange * 0.3f);
+                Render2D.FillRectangle(_resizeButtonRect, style.Selection);
+                Render2D.DrawRectangle(_resizeButtonRect, style.SelectionBorder);
             }
 
             // Resize button

Source/Editor/Surface/VisjectSurface.Draw.cs

@@ -96,9 +96,10 @@ namespace FlaxEditor.Surface
         /// <remarks>Called only when user is selecting nodes using rectangle tool.</remarks>
         protected virtual void DrawSelection()
         {
+            var style = FlaxEngine.GUI.Style.Current;
             var selectionRect = Rectangle.FromPoints(_leftMouseDownPos, _mousePos);
-            Render2D.FillRectangle(selectionRect, Color.Orange * 0.4f);
+            Render2D.FillRectangle(selectionRect, style.Selection);
-            Render2D.DrawRectangle(selectionRect, Color.Orange);
+            Render2D.DrawRectangle(selectionRect, style.SelectionBorder);
         }
 
         /// <summary>

Source/Editor/Surface/VisjectSurface.cs

@@ -382,6 +382,7 @@ namespace FlaxEditor.Surface
             {
                 new InputActionsContainer.Binding(options => options.Delete, Delete),
                 new InputActionsContainer.Binding(options => options.SelectAll, SelectAll),
+                new InputActionsContainer.Binding(options => options.DeselectAll, DeselectAll),
                 new InputActionsContainer.Binding(options => options.Copy, Copy),
                 new InputActionsContainer.Binding(options => options.Paste, Paste),
                 new InputActionsContainer.Binding(options => options.Cut, Cut),
@@ -611,17 +612,14 @@ namespace FlaxEditor.Surface
             _context.MarkAsModified(graphEdited);
         }
 
-        /// <summary>
+        private void BulkSelectUpdate(bool select = true)
-        /// Selects all the nodes.
-        /// </summary>
-        public void SelectAll()
         {
             bool selectionChanged = false;
             for (int i = 0; i < _rootControl.Children.Count; i++)
             {
-                if (_rootControl.Children[i] is SurfaceControl control && !control.IsSelected)
+                if (_rootControl.Children[i] is SurfaceControl control && control.IsSelected != select)
                 {
-                    control.IsSelected = true;
+                    control.IsSelected = select;
                     selectionChanged = true;
                 }
             }
@@ -629,6 +627,22 @@ namespace FlaxEditor.Surface
                 SelectionChanged?.Invoke();
         }
 
+        /// <summary>
+        /// Selects all the nodes.
+        /// </summary>
+        public void SelectAll()
+        {
+            BulkSelectUpdate(true);
+        }
+
+        /// <summary>
+        /// Deelects all the nodes.
+        /// </summary>
+        public void DeselectAll()
+        {
+            BulkSelectUpdate(false);
+        }
+
         /// <summary>
         /// Clears the selection.
         /// </summary>

Source/Editor/Undo/Actions/BreakPrefabLinkAction.cs

@@ -17,6 +17,30 @@ namespace FlaxEditor.Actions
     [Serializable]
     sealed class BreakPrefabLinkAction : IUndoAction
     {
+        private struct Item
+        {
+            public Guid ID;
+            public Guid PrefabID;
+            public Guid PrefabObjectID;
+
+            public unsafe Item(SceneObject obj, List<Item> nestedPrefabLinks)
+            {
+                ID = obj.ID;
+                PrefabID = obj.PrefabID;
+                PrefabObjectID = obj.PrefabObjectID;
+                if (nestedPrefabLinks != null)
+                {
+                    // Check if this object comes from another nested prefab (to break link only from the top-level prefab)
+                    Item nested;
+                    nested.ID = ID;
+                    fixed (Item* i = &this)
+                        Editor.Internal_GetPrefabNestedObject(new IntPtr(&i->PrefabID), new IntPtr(&i->PrefabObjectID), new IntPtr(&nested.PrefabID), new IntPtr(&nested.PrefabObjectID));
+                    if (nested.PrefabID != Guid.Empty && nested.PrefabObjectID != Guid.Empty)
+                        nestedPrefabLinks.Add(nested);
+                }
+            }
+        }
+
         [Serialize]
         private readonly bool _isBreak;
 
@@ -24,25 +48,18 @@ namespace FlaxEditor.Actions
         private Guid _actorId;
 
         [Serialize]
-        private Guid _prefabId;
+        private List<Item> _items = new();
 
-        [Serialize]
+        private BreakPrefabLinkAction(bool isBreak, Guid actorId)
-        private Dictionary<Guid, Guid> _prefabObjectIds;
-
-        private BreakPrefabLinkAction(bool isBreak, Guid actorId, Guid prefabId)
         {
             _isBreak = isBreak;
             _actorId = actorId;
-            _prefabId = prefabId;
         }
 
         private BreakPrefabLinkAction(bool isBreak, Actor actor)
         {
             _isBreak = isBreak;
             _actorId = actor.ID;
-            _prefabId = actor.PrefabID;
-
-            _prefabObjectIds = new Dictionary<Guid, Guid>(1024);
             CollectIds(actor);
         }
 
@@ -55,7 +72,7 @@ namespace FlaxEditor.Actions
         {
             if (actor == null)
                 throw new ArgumentNullException(nameof(actor));
-            return new BreakPrefabLinkAction(true, actor.ID, Guid.Empty);
+            return new BreakPrefabLinkAction(true, actor.ID);
         }
 
         /// <summary>
@@ -96,53 +113,45 @@ namespace FlaxEditor.Actions
         /// <inheritdoc />
         public void Dispose()
         {
-            _prefabObjectIds.Clear();
+            _items.Clear();
         }
 
         private void DoLink()
         {
-            if (_prefabObjectIds == null)
-                throw new Exception("Cannot link prefab. Missing objects Ids mapping.");
-
             var actor = Object.Find<Actor>(ref _actorId);
             if (actor == null)
                 throw new Exception("Cannot link prefab. Missing actor.");
 
-            // Restore cached links
+            Link(_items);
-            foreach (var e in _prefabObjectIds)
+            Refresh(actor);
-            {
-                var objId = e.Key;
-                var prefabObjId = e.Value;
-
-                var obj = Object.Find<Object>(ref objId);
-                if (obj is Actor)
-                {
-                    Actor.Internal_LinkPrefab(Object.GetUnmanagedPtr(obj), ref _prefabId, ref prefabObjId);
-                }
-                else if (obj is Script)
-                {
-                    Script.Internal_LinkPrefab(Object.GetUnmanagedPtr(obj), ref _prefabId, ref prefabObjId);
-                }
-            }
-
-            Editor.Instance.Scene.MarkSceneEdited(actor.Scene);
-            Editor.Instance.Windows.PropertiesWin.Presenter.BuildLayout();
         }
 
-        private void CollectIds(Actor actor)
+        private void Link(List<Item> items)
         {
-            _prefabObjectIds.Add(actor.ID, actor.PrefabObjectID);
+            for (int i = 0; i < items.Count; i++)
+            {
+                var item = items[i];
+                var obj = Object.Find<Object>(ref item.ID);
+                if (obj != null)
+                    SceneObject.Internal_LinkPrefab(Object.GetUnmanagedPtr(obj), ref item.PrefabID, ref item.PrefabObjectID);
+            }
+        }
+
+        private void CollectIds(Actor actor, List<Item> nestedPrefabLinks = null)
+        {
+            _items.Add(new Item(actor, nestedPrefabLinks));
 
             for (int i = 0; i < actor.ChildrenCount; i++)
-            {
+                CollectIds(actor.GetChild(i), nestedPrefabLinks);
-                CollectIds(actor.GetChild(i));
-            }
 
             for (int i = 0; i < actor.ScriptsCount; i++)
-            {
+                _items.Add(new Item(actor.GetScript(i), nestedPrefabLinks));
-                var script = actor.GetScript(i);
+        }
-                _prefabObjectIds.Add(script.ID, script.PrefabObjectID);
+
-            }
+        private void Refresh(Actor actor)
+        {
+            Editor.Instance.Scene.MarkSceneEdited(actor.Scene);
+            Editor.Instance.Windows.PropertiesWin.Presenter.BuildLayout();
         }
 
         private void DoBreak()
@@ -153,18 +162,18 @@ namespace FlaxEditor.Actions
             if (!actor.HasPrefabLink)
                 throw new Exception("Cannot break missing prefab link.");
 
-            if (_prefabObjectIds == null)
+            // Cache 'prev' state and extract any nested prefab instances to remain
-                _prefabObjectIds = new Dictionary<Guid, Guid>(1024);
+            _items.Clear();
-            else
+            var nestedPrefabLinks = new List<Item>();
-                _prefabObjectIds.Clear();
+            CollectIds(actor, nestedPrefabLinks);
-            CollectIds(actor);
-
-            _prefabId = actor.PrefabID;
 
+            // Break prefab linkage
             actor.BreakPrefabLink();
 
-            Editor.Instance.Scene.MarkSceneEdited(actor.Scene);
+            // Restore prefab link for nested instances
-            Editor.Instance.Windows.PropertiesWin.Presenter.BuildLayout();
+            Link(nestedPrefabLinks);
+
+            Refresh(actor);
         }
     }
 }

Source/Editor/Undo/Actions/DeleteActorsAction.cs

@@ -3,7 +3,6 @@
 using System;
 using System.Collections.Generic;
 using FlaxEditor.SceneGraph;
-using FlaxEditor.Scripting;
 using FlaxEngine;
 using FlaxEngine.Utilities;
 
@@ -25,6 +24,9 @@ namespace FlaxEditor.Actions
         [Serialize]
         private Guid[] _nodeParentsIDs;
 
+        [Serialize]
+        private int[] _nodeParentsOrders;
+
         [Serialize]
         private Guid[] _prefabIds;
 
@@ -43,12 +45,35 @@ namespace FlaxEditor.Actions
         [Serialize]
         protected List<SceneGraphNode> _nodeParents;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="DeleteActorsAction"/> class.
+        /// </summary>
+        /// <param name="actor">The actor.</param>
+        /// <param name="isInverted">If set to <c>true</c> action will be inverted - instead of delete it will create actors.</param>
+        /// <param name="preserveOrder">If set to <c>true</c> action will be preserve actors order when performing undo.</param>
+        internal DeleteActorsAction(Actor actor, bool isInverted = false, bool preserveOrder = true)
+        : this(new List<SceneGraphNode>(1) { SceneGraphFactory.FindNode(actor.ID) }, isInverted, preserveOrder)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="DeleteActorsAction"/> class.
+        /// </summary>
+        /// <param name="node">The object.</param>
+        /// <param name="isInverted">If set to <c>true</c> action will be inverted - instead of delete it will create actors.</param>
+        /// <param name="preserveOrder">If set to <c>true</c> action will be preserve actors order when performing undo.</param>
+        internal DeleteActorsAction(SceneGraphNode node, bool isInverted = false, bool preserveOrder = true)
+        : this(new List<SceneGraphNode>(1) { node }, isInverted, preserveOrder)
+        {
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="DeleteActorsAction"/> class.
         /// </summary>
         /// <param name="nodes">The objects.</param>
-        /// <param name="isInverted">If set to <c>true</c> action will be inverted - instead of delete it will be create actors.</param>
+        /// <param name="isInverted">If set to <c>true</c> action will be inverted - instead of delete it will create actors.</param>
-        internal DeleteActorsAction(List<SceneGraphNode> nodes, bool isInverted = false)
+        /// <param name="preserveOrder">If set to <c>true</c> action will be preserve actors order when performing undo.</param>
+        internal DeleteActorsAction(List<SceneGraphNode> nodes, bool isInverted = false, bool preserveOrder = true)
         {
             _isInverted = isInverted;
 
@@ -82,6 +107,12 @@ namespace FlaxEditor.Actions
             _nodeParentsIDs = new Guid[_nodeParents.Count];
             for (int i = 0; i < _nodeParentsIDs.Length; i++)
                 _nodeParentsIDs[i] = _nodeParents[i].ID;
+            if (preserveOrder)
+            {
+                _nodeParentsOrders = new int[_nodeParents.Count];
+                for (int i = 0; i < _nodeParentsOrders.Length; i++)
+                    _nodeParentsOrders[i] = _nodeParents[i].OrderInParent;
+            }
 
             // Serialize actors
             _actorsData = Actor.ToBytes(actors.ToArray());
@@ -122,6 +153,7 @@ namespace FlaxEditor.Actions
         {
             _actorsData = null;
             _nodeParentsIDs = null;
+            _nodeParentsOrders = null;
             _prefabIds = null;
             _prefabObjectIds = null;
             _nodeParents.Clear();
@@ -211,6 +243,8 @@ namespace FlaxEditor.Actions
                 if (foundNode is ActorNode node)
                 {
                     nodes.Add(node);
+                    if (_nodeParentsOrders != null)
+                        node.Actor.OrderInParent = _nodeParentsOrders[i];
                 }
             }
             nodes.BuildNodesParents(_nodeParents);

Source/Editor/Undo/Actions/ParentActorsAction.cs

@@ -0,0 +1,199 @@
+// Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
+
+using System;
+using System.Collections.Generic;
+using FlaxEngine;
+using Object = FlaxEngine.Object;
+
+namespace FlaxEditor.Actions
+{
+    /// <summary>
+    /// Implementation of <see cref="IUndoAction"/> used to change parent for <see cref="Actor"/> or <see cref="Script"/>.
+    /// </summary>
+    /// <seealso cref="FlaxEditor.IUndoAction" />
+    [Serializable]
+    class ParentActorsAction : IUndoAction
+    {
+        private struct Item
+        {
+            public Guid ID;
+            public Guid Parent;
+            public int OrderInParent;
+            public Transform LocalTransform;
+        }
+
+        [Serialize]
+        private bool _worldPositionsStays;
+
+        [Serialize]
+        private Guid _newParent;
+
+        [Serialize]
+        private int _newOrder;
+
+        [Serialize]
+        private Item[] _items;
+
+        [Serialize]
+        private Guid[] _idsForPrefab;
+
+        [Serialize]
+        private Guid[] _prefabIds;
+
+        [Serialize]
+        private Guid[] _prefabObjectIds;
+
+        public ParentActorsAction(SceneObject[] objects, Actor newParent, int newOrder, bool worldPositionsStays = true)
+        {
+            // Sort source objects to provide deterministic behavior
+            Array.Sort(objects, SortObjects);
+
+            // Cache initial state for undo
+            _worldPositionsStays = worldPositionsStays;
+            _newParent = newParent.ID;
+            _newOrder = newOrder;
+            _items = new Item[objects.Length];
+            for (int i = 0; i < objects.Length; i++)
+            {
+                var obj = objects[i];
+                _items[i] = new Item
+                {
+                    ID = obj.ID,
+                    Parent = obj.Parent?.ID ?? Guid.Empty,
+                    OrderInParent = obj.OrderInParent,
+                    LocalTransform = obj is Actor actor ? actor.LocalTransform : Transform.Identity,
+                };
+            }
+
+            // Collect all objects that have prefab links so they can be restored on undo
+            var prefabs = new List<SceneObject>();
+            for (int i = 0; i < objects.Length; i++)
+                GetAllPrefabs(prefabs, objects[i]);
+            if (prefabs.Count != 0)
+            {
+                // Cache ids of all objects
+                _idsForPrefab = new Guid[prefabs.Count];
+                _prefabIds = new Guid[prefabs.Count];
+                _prefabObjectIds = new Guid[prefabs.Count];
+                for (int i = 0; i < prefabs.Count; i++)
+                {
+                    var obj = prefabs[i];
+                    _idsForPrefab[i] = obj.ID;
+                    _prefabIds[i] = obj.PrefabID;
+                    _prefabObjectIds[i] = obj.PrefabObjectID;
+                }
+            }
+        }
+
+        private static int SortObjects(SceneObject a, SceneObject b)
+        {
+            // By parent
+            var aParent = Object.GetUnmanagedPtr(a.Parent);
+            var bParent = Object.GetUnmanagedPtr(b.Parent);
+            if (aParent == bParent)
+            {
+                // By index in parent
+                var aOrder = a.OrderInParent;
+                var bOrder = b.OrderInParent;
+                return aOrder.CompareTo(bOrder);
+            }
+            return aParent.CompareTo(bParent);
+        }
+
+        private static void GetAllPrefabs(List<SceneObject> result, SceneObject obj)
+        {
+            if (result.Contains(obj))
+                return;
+            if (obj.HasPrefabLink)
+                result.Add(obj);
+            if (obj is Actor actor)
+            {
+                for (int i = 0; i < actor.ScriptsCount; i++)
+                    GetAllPrefabs(result, actor.GetScript(i));
+                for (int i = 0; i < actor.ChildrenCount; i++)
+                    GetAllPrefabs(result, actor.GetChild(i));
+            }
+        }
+
+        public string ActionString => "Change parent";
+
+        public void Do()
+        {
+            // Perform action
+            var newParent = Object.Find<Actor>(ref _newParent);
+            if (newParent == null)
+            {
+                Editor.LogError("Missing actor to change objects parent.");
+                return;
+            }
+            var order = _newOrder;
+            var scenes = new HashSet<Scene> { newParent.Scene };
+            for (int i = 0; i < _items.Length; i++)
+            {
+                var item = _items[i];
+                var obj = Object.Find<SceneObject>(ref item.ID);
+                if (obj != null)
+                {
+                    scenes.Add(obj.Parent.Scene);
+                    if (obj is Actor actor)
+                        actor.SetParent(newParent, _worldPositionsStays, true);
+                    else
+                        obj.Parent = newParent;
+                    if (order != -1)
+                        obj.OrderInParent = order++;
+                }
+            }
+
+            // Prefab links are broken by the C++ backend on actor reparenting
+
+            // Mark scenes as edited
+            foreach (var scene in scenes)
+                Editor.Instance.Scene.MarkSceneEdited(scene);
+        }
+
+        public void Undo()
+        {
+            // Restore state
+            for (int i = 0; i < _items.Length; i++)
+            {
+                var item = _items[i];
+                var obj = Object.Find<SceneObject>(ref item.ID);
+                if (obj != null)
+                {
+                    var parent = Object.Find<Actor>(ref item.Parent);
+                    if (parent != null)
+                        obj.Parent = parent;
+                    if (obj is Actor actor)
+                        actor.LocalTransform = item.LocalTransform;
+                }
+            }
+            for (int j = 0; j < _items.Length; j++) // TODO: find a better way ensure the order is properly restored when moving back multiple objects
+            for (int i = 0; i < _items.Length; i++)
+            {
+                var item = _items[i];
+                var obj = Object.Find<SceneObject>(ref item.ID);
+                if (obj != null)
+                    obj.OrderInParent = item.OrderInParent;
+            }
+
+            // Restore prefab links (if any was in use)
+            if (_idsForPrefab != null)
+            {
+                for (int i = 0; i < _idsForPrefab.Length; i++)
+                {
+                    var obj = Object.Find<SceneObject>(ref _idsForPrefab[i]);
+                    if (obj != null && _prefabIds[i] != Guid.Empty)
+                        SceneObject.Internal_LinkPrefab(Object.GetUnmanagedPtr(obj), ref _prefabIds[i], ref _prefabObjectIds[i]);
+                }
+            }
+        }
+
+        public void Dispose()
+        {
+            _items = null;
+            _idsForPrefab = null;
+            _prefabIds = null;
+            _prefabObjectIds = null;
+        }
+    }
+}

Source/Editor/Undo/Actions/PasteActorsAction.cs

@@ -2,7 +2,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using FlaxEditor.SceneGraph;
 using FlaxEngine;
 
@@ -165,7 +164,7 @@ namespace FlaxEditor.Actions
                         var child = children[j];
                         if (child != actor && child.Name == name)
                         {
-                            string newName = Utilities.Utils.IncrementNameNumber(name, x => IsNameValid(x));
+                            string newName = Utilities.Utils.IncrementNameNumber(name, IsNameValid);
                             foundNamesResults[newName] = true;
                             actor.Name = newName;
                             // Multiple actors may have the same name, continue

Source/Editor/Undo/Undo.cs

@@ -38,9 +38,6 @@ namespace FlaxEditor
         /// <summary>
         /// Gets the undo operations stack.
         /// </summary>
-        /// <value>
-        /// The undo operations stack.
-        /// </value>
         public HistoryStack UndoOperationsStack { get; }
 
         /// <summary>
@@ -138,6 +135,7 @@ namespace FlaxEditor
                 return;
 
             _snapshots.Add(snapshotInstance, new UndoInternal(snapshotInstance, actionString));
+
         }
 
         /// <summary>
@@ -152,9 +150,7 @@ namespace FlaxEditor
                 return;
 
             if (snapshotInstance == null)
-            {
                 snapshotInstance = _snapshots.Last().Key;
-            }
             var action = _snapshots[snapshotInstance].End(snapshotInstance);
             _snapshots.Remove(snapshotInstance);
 
@@ -249,9 +245,7 @@ namespace FlaxEditor
                 return;
 
             if (snapshotInstance == null)
-            {
                 snapshotInstance = (object[])_snapshots.Last().Key;
-            }
             var action = _snapshots[snapshotInstance].End(snapshotInstance);
             _snapshots.Remove(snapshotInstance);
 
@@ -325,12 +319,10 @@ namespace FlaxEditor
         {
             if (action == null)
                 throw new ArgumentNullException();
-
             if (!Enabled)
                 return;
 
             UndoOperationsStack.Push(action);
-
             OnAction(action);
         }
 

Source/Editor/Utilities/Utils.cs

@@ -11,7 +11,6 @@ using System.Globalization;
 using System.Collections.Generic;
 using System.IO;
 using System.Reflection;
-using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Text;
 using System.Text.RegularExpressions;
@@ -20,6 +19,7 @@ using FlaxEditor.GUI.Input;
 using FlaxEditor.GUI.Tree;
 using FlaxEditor.SceneGraph;
 using FlaxEngine;
+using FlaxEngine.Json;
 using FlaxEngine.GUI;
 using FlaxEngine.Utilities;
 using FlaxEditor.Windows;
@@ -203,6 +203,22 @@ namespace FlaxEditor.Utilities
             }
         }
 
+        /// <summary>
+        /// Clones the value. handles non-value types (such as arrays) that need deep value cloning.
+        /// </summary>
+        /// <param name="value">The source value to clone.</param>
+        /// <returns>The duplicated value.</returns>
+        internal static object CloneValue(object value)
+        {
+            // For objects (eg. arrays) we need to clone them to prevent editing default/reference value within editor
+            if (value != null && (!value.GetType().IsValueType || !value.GetType().IsClass))
+            {
+                var json = JsonSerializer.Serialize(value);
+                value = JsonSerializer.Deserialize(json, value.GetType());
+            }
+            return value;
+        }
+
         /// <summary>
         /// The colors for the keyframes used by the curve editor.
         /// </summary>
@@ -1289,6 +1305,7 @@ namespace FlaxEditor.Utilities
             inputActions.Add(options => options.Paste, Editor.Instance.SceneEditing.Paste);
             inputActions.Add(options => options.Duplicate, Editor.Instance.SceneEditing.Duplicate);
             inputActions.Add(options => options.SelectAll, Editor.Instance.SceneEditing.SelectAllScenes);
+            inputActions.Add(options => options.DeselectAll, Editor.Instance.SceneEditing.DeselectAllScenes);
             inputActions.Add(options => options.Delete, Editor.Instance.SceneEditing.Delete);
             inputActions.Add(options => options.Search, () => Editor.Instance.Windows.SceneWin.Search());
             inputActions.Add(options => options.MoveActorToViewport, Editor.Instance.UI.MoveActorToViewport);

Source/Editor/Viewport/PrefabWindowViewport.cs

@@ -2,7 +2,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using FlaxEditor.Content;
 using FlaxEditor.Gizmo;
 using FlaxEditor.GUI.ContextMenu;
@@ -591,15 +590,32 @@ namespace FlaxEditor.Viewport
             base.Draw();
 
             // Selected UI controls outline
+            bool drawAnySelectedControl = false;
+            // TODO: optimize this (eg. cache list of selected UIControl's when selection gets changed)
             for (var i = 0; i < _window.Selection.Count; i++)
             {
-                if (_window.Selection[i]?.EditableObject is UIControl controlActor && controlActor && controlActor.Control != null)
+                if (_window.Selection[i]?.EditableObject is UIControl controlActor && controlActor && controlActor.Control != null && controlActor.Control.VisibleInHierarchy && controlActor.Control.RootWindow != null)
                 {
+                    if (!drawAnySelectedControl)
+                    {
+                        drawAnySelectedControl = true;
+                        Render2D.PushTransform(ref _cachedTransform);
+                    }
                     var control = controlActor.Control;
-                    var bounds = Rectangle.FromPoints(control.PointToParent(this, Float2.Zero), control.PointToParent(this, control.Size));
+                    var bounds = control.EditorBounds;
-                    Render2D.DrawRectangle(bounds, Editor.Instance.Options.Options.Visual.SelectionOutlineColor0, Editor.Instance.Options.Options.Visual.UISelectionOutlineSize);
+                    var p1 = control.PointToParent(this, bounds.UpperLeft);
+                    var p2 = control.PointToParent(this, bounds.UpperRight);
+                    var p3 = control.PointToParent(this, bounds.BottomLeft);
+                    var p4 = control.PointToParent(this, bounds.BottomRight);
+                    var min = Float2.Min(Float2.Min(p1, p2), Float2.Min(p3, p4));
+                    var max = Float2.Max(Float2.Max(p1, p2), Float2.Max(p3, p4));
+                    bounds = new Rectangle(min, Float2.Max(max - min, Float2.Zero));
+                    var options = Editor.Instance.Options.Options.Visual;
+                    Render2D.DrawRectangle(bounds, options.SelectionOutlineColor0, options.UISelectionOutlineSize);
                 }
             }
+            if (drawAnySelectedControl)
+                Render2D.PopTransform();
         }
 
         /// <inheritdoc />
@@ -799,6 +815,15 @@ namespace FlaxEditor.Viewport
         {
             base.OnDebugDraw(context, ref renderContext);
 
+            // Collect selected objects debug shapes again when DebugDraw is active with a custom context
+            _debugDrawData.Clear();
+            var selectedParents = TransformGizmo.SelectedParents;
+            for (int i = 0; i < selectedParents.Count; i++)
+            {
+                if (selectedParents[i].IsActiveInHierarchy)
+                    selectedParents[i].OnDebugDraw(_debugDrawData);
+            }
+
             unsafe
             {
                 fixed (IntPtr* actors = _debugDrawData.ActorsPtrs)

Source/Editor/Viewport/Previews/AssetPreview.cs

@@ -239,6 +239,8 @@ namespace FlaxEditor.Viewport.Previews
         /// <inheritdoc />
         public override void OnDestroy()
         {
+            if (IsDisposing)
+                return;
             Object.Destroy(ref PreviewLight);
             Object.Destroy(ref EnvProbe);
             Object.Destroy(ref Sky);

Source/Editor/Viewport/Previews/AudioClipPreview.cs

@@ -184,6 +184,7 @@ namespace FlaxEditor.Viewport.Previews
                     break;
                 default: throw new ArgumentOutOfRangeException();
                 }
+                samplesPerIndex = Math.Max(samplesPerIndex, info.NumChannels);
                 const uint maxSamplesPerIndex = 64;
                 uint samplesPerIndexDiff = Math.Max(1, samplesPerIndex / Math.Min(samplesPerIndex, maxSamplesPerIndex));
 

Source/Editor/Windows/Assets/PrefabWindow.cs

@@ -355,6 +355,8 @@ namespace FlaxEditor.Windows.Assets
 
             try
             {
+                Editor.Scene.OnSaveStart(_viewport);
+
                 // Simply update changes
                 Editor.Prefabs.ApplyAll(_viewport.Instance);
 
@@ -371,6 +373,10 @@ namespace FlaxEditor.Windows.Assets
 
                 throw;
             }
+            finally
+            {
+                Editor.Scene.OnSaveEnd(_viewport);
+            }
         }
 
         /// <inheritdoc />

Source/Editor/Windows/DebugLogWindow.cs

@@ -170,6 +170,8 @@ namespace FlaxEditor.Windows
             /// <inheritdoc />
             public override bool OnKeyDown(KeyboardKeys key)
             {
+                InputOptions options = FlaxEditor.Editor.Instance.Options.Options.Input;
+
                 // Up
                 if (key == KeyboardKeys.ArrowUp)
                 {
@@ -200,7 +202,7 @@ namespace FlaxEditor.Windows
                     Open();
                 }
                 // Ctrl+C
-                else if (key == KeyboardKeys.C && Root.GetKey(KeyboardKeys.Control))
+                else if (options.Copy.Process(this))
                 {
                     Copy();
                     return true;

Source/Editor/Windows/GameWindow.cs

@@ -23,6 +23,7 @@ namespace FlaxEditor.Windows
         private bool _showGUI = true;
         private bool _showDebugDraw = false;
         private bool _isMaximized = false, _isUnlockingMouse = false;
+        private bool _isFloating = false, _isBorderless = false;
         private bool _cursorVisible = true;
         private float _gameStartTime;
         private GUI.Docking.DockState _maximizeRestoreDockState;
@@ -68,7 +69,7 @@ namespace FlaxEditor.Windows
         }
 
         /// <summary>
-        /// Gets or sets a value indicating whether game window is maximized (only in play mode).
+        /// Gets or sets a value indicating whether the game window is maximized (only in play mode).
         /// </summary>
         private bool IsMaximized
         {
@@ -78,20 +79,42 @@ namespace FlaxEditor.Windows
                 if (_isMaximized == value)
                     return;
                 _isMaximized = value;
+                if (value)
+                {
+                    IsFloating = true;
+                    var rootWindow = RootWindow;
+                    rootWindow.Maximize();
+                }
+                else
+                {
+                    IsFloating = false;
+                }
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether the game window is floating (popup, only in play mode).
+        /// </summary>
+        private bool IsFloating
+        {
+            get => _isFloating;
+            set
+            {
+                if (_isFloating == value)
+                    return;
+                _isFloating = value;
                 var rootWindow = RootWindow;
                 if (value)
                 {
-                    // Maximize
                     _maximizeRestoreDockTo = _dockedTo;
                     _maximizeRestoreDockState = _dockedTo.TryGetDockState(out _);
                     if (_maximizeRestoreDockState != GUI.Docking.DockState.Float)
                     {
                         var monitorBounds = Platform.GetMonitorBounds(PointToScreen(Size * 0.5f));
-                        ShowFloating(monitorBounds.Location + new Float2(200, 200), Float2.Zero, WindowStartPosition.Manual);
+                        var size = DefaultSize;
-                        rootWindow = RootWindow;
+                        var location = monitorBounds.Location + monitorBounds.Size * 0.5f - size * 0.5f;
+                        ShowFloating(location, size, WindowStartPosition.Manual);
                     }
-                    if (rootWindow != null && !rootWindow.IsMaximized)
-                        rootWindow.Maximize();
                 }
                 else
                 {
@@ -105,6 +128,33 @@ namespace FlaxEditor.Windows
             }
         }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether the game window is borderless (only in play mode).
+        /// </summary>
+        private bool IsBorderless
+        {
+            get => _isBorderless;
+            set
+            {
+                if (_isBorderless == value)
+                    return;
+                _isBorderless = value;
+                if (value)
+                {
+                    IsFloating = true;
+                    var rootWindow = RootWindow;
+                    var monitorBounds = Platform.GetMonitorBounds(rootWindow.RootWindow.Window.ClientPosition);
+                    rootWindow.Window.Position = monitorBounds.Location;
+                    rootWindow.Window.SetBorderless(true);
+                    rootWindow.Window.ClientSize = monitorBounds.Size;
+                }
+                else
+                {
+                    IsFloating = false;
+                }
+            }
+        }
+
         /// <summary>
         /// Gets or sets a value indicating whether center mouse position on window focus in play mode. Helps when working with games that lock mouse cursor.
         /// </summary>
@@ -318,6 +368,20 @@ namespace FlaxEditor.Windows
             InputActions.Add(options => options.TakeScreenshot, () => Screenshot.Capture(string.Empty));
             InputActions.Add(options => options.DebuggerUnlockMouse, UnlockMouseInPlay);
             InputActions.Add(options => options.ToggleFullscreen, () => { if (Editor.IsPlayMode) IsMaximized = !IsMaximized; });
+            InputActions.Add(options => options.Play, Editor.Instance.Simulation.DelegatePlayOrStopPlayInEditor);
+            InputActions.Add(options => options.Pause, Editor.Instance.Simulation.RequestResumeOrPause);
+            InputActions.Add(options => options.StepFrame, Editor.Instance.Simulation.RequestPlayOneFrame);
+            InputActions.Add(options => options.ProfilerStartStop, () =>
+            {
+                bool recording = !Editor.Instance.Windows.ProfilerWin.LiveRecording;
+                Editor.Instance.Windows.ProfilerWin.LiveRecording = recording;
+                Editor.Instance.UI.AddStatusMessage($"Profiling {(recording ? "started" : "stopped")}.");
+            });
+            InputActions.Add(options => options.ProfilerClear, () =>
+            {
+                Editor.Instance.Windows.ProfilerWin.Clear();
+                Editor.Instance.UI.AddStatusMessage($"Profiling results cleared.");
+            });
         }
 
         private void ChangeViewportRatio(ViewportScaleOptions v)
@@ -474,7 +538,9 @@ namespace FlaxEditor.Windows
         /// <inheritdoc />
         public override void OnPlayEnd()
         {
+            IsFloating = false;
             IsMaximized = false;
+            IsBorderless = false;
             Cursor = CursorType.Default;
         }
 
@@ -856,7 +922,7 @@ namespace FlaxEditor.Windows
             var selection = Editor.SceneEditing.Selection;
             for (var i = 0; i < selection.Count; i++)
             {
-                if (selection[i].EditableObject is UIControl controlActor && controlActor && controlActor.Control != null)
+                if (selection[i].EditableObject is UIControl controlActor && controlActor && controlActor.Control != null && controlActor.Control.VisibleInHierarchy && controlActor.Control.RootWindow != null)
                 {
                     if (!drawAnySelectedControl)
                     {
@@ -902,7 +968,7 @@ namespace FlaxEditor.Windows
                 if (animTime < 0)
                 {
                     float alpha = Mathf.Saturate(-animTime / fadeOutTime);
-                    Render2D.DrawRectangle(new Rectangle(new Float2(4), Size - 8), Color.Orange * alpha);
+                    Render2D.DrawRectangle(new Rectangle(new Float2(4), Size - 8), style.SelectionBorder * alpha);
                 }
 
                 // Add overlay during debugger breakpoint hang
@@ -956,6 +1022,29 @@ namespace FlaxEditor.Windows
             Focus();
         }
 
+        /// <summary>
+        /// Apply the selected window mode to the game window.
+        /// </summary>
+        /// <param name="mode"></param>
+        public void SetWindowMode(InterfaceOptions.GameWindowMode mode)
+        {
+            switch (mode)
+            {
+            case InterfaceOptions.GameWindowMode.Docked:
+                break;
+            case InterfaceOptions.GameWindowMode.PopupWindow:
+                IsFloating = true;
+                break;
+            case InterfaceOptions.GameWindowMode.MaximizedWindow:
+                IsMaximized = true;
+                break;
+            case InterfaceOptions.GameWindowMode.BorderlessWindow:
+                IsBorderless = true;
+                break;
+            default: throw new ArgumentOutOfRangeException(nameof(mode), mode, null);
+            }
+        }
+
         /// <summary>
         /// Takes the screenshot of the current viewport.
         /// </summary>

Source/Editor/Windows/Search/ContentSearchWindow.cs

@@ -12,6 +12,7 @@ using FlaxEditor.GUI.ContextMenu;
 using FlaxEditor.GUI.Docking;
 using FlaxEditor.GUI.Input;
 using FlaxEditor.GUI.Tree;
+using FlaxEditor.Options;
 using FlaxEditor.Scripting;
 using FlaxEditor.Surface;
 using FlaxEditor.Windows;
@@ -142,6 +143,7 @@ namespace FlaxEngine.Windows.Search
             /// <inheritdoc />
             public override bool OnKeyDown(KeyboardKeys key)
             {
+                InputOptions options = FlaxEditor.Editor.Instance.Options.Options.Input;
                 if (IsFocused)
                 {
                     if (key == KeyboardKeys.Return && Navigate != null)
@@ -149,7 +151,7 @@ namespace FlaxEngine.Windows.Search
                         Navigate.Invoke(this);
                         return true;
                     }
-                    if (key == KeyboardKeys.C && Root.GetKey(KeyboardKeys.Control))
+                    if (options.Copy.Process(this))
                     {
                         Clipboard.Text = Text;
                         return true;

Source/Engine/AI/Behavior.h

@@ -11,7 +11,7 @@
 /// <summary>
 /// Behavior instance script that runs Behavior Tree execution.
 /// </summary>
-API_CLASS() class FLAXENGINE_API Behavior : public Script
+API_CLASS(Attributes="Category(\"Flax Engine\")") class FLAXENGINE_API Behavior : public Script
 {
     API_AUTO_SERIALIZATION();
     DECLARE_SCRIPTING_TYPE(Behavior);

Source/Engine/AI/BehaviorTreeNodes.cpp

@@ -706,6 +706,14 @@ bool BehaviorTreeKnowledgeValuesConditionalDecorator::CanUpdate(const BehaviorUp
     return BehaviorKnowledge::CompareValues((float)ValueA.Get(context.Knowledge), (float)ValueB.Get(context.Knowledge), Comparison);
 }
 
+bool BehaviorTreeKnowledgeBooleanDecorator::CanUpdate(const BehaviorUpdateContext& context)
+{
+    Variant value = Value.Get(context.Knowledge);
+    bool result = (bool)value;
+    result ^= Invert;
+    return result;
+}
+
 bool BehaviorTreeHasTagDecorator::CanUpdate(const BehaviorUpdateContext& context)
 {
     bool result = false;

Source/Engine/AI/BehaviorTreeNodes.h

@@ -445,6 +445,27 @@ public:
     bool CanUpdate(const BehaviorUpdateContext& context) override;
 };
 
+/// <summary>
+/// Checks certain knowledge value to conditionally enter the node if the value is set (eg. not-null object reference or boolean value).
+/// </summary>
+API_CLASS(Sealed) class FLAXENGINE_API BehaviorTreeKnowledgeBooleanDecorator : public BehaviorTreeDecorator
+{
+    DECLARE_SCRIPTING_TYPE_WITH_CONSTRUCTOR_IMPL(BehaviorTreeKnowledgeBooleanDecorator, BehaviorTreeDecorator);
+    API_AUTO_SERIALIZATION();
+
+    // The value from behavior's knowledge (blackboard, goal or sensor) to check if it's set (eg. not-null object reference or boolean value).
+    API_FIELD(Attributes="EditorOrder(0)")
+    BehaviorKnowledgeSelectorAny Value;
+
+    // If checked, the condition will be inverted.
+    API_FIELD(Attributes="EditorOrder(10)")
+    bool Invert = false;
+
+public:
+    // [BehaviorTreeNode]
+    bool CanUpdate(const BehaviorUpdateContext& context) override;
+};
+
 /// <summary>
 /// Checks if certain actor (from knowledge) has a given tag assigned.
 /// </summary>

Source/Engine/Animations/Graph/AnimGraph.h

@@ -900,5 +900,6 @@ private:
     Variant SampleState(AnimGraphContext& context, const AnimGraphNode* state);
     void InitStateTransition(AnimGraphContext& context, AnimGraphInstanceData::StateMachineBucket& stateMachineBucket, AnimGraphStateTransition* transition = nullptr);
     AnimGraphStateTransition* UpdateStateTransitions(AnimGraphContext& context, const AnimGraphNode::StateMachineData& stateMachineData, AnimGraphNode* state, AnimGraphNode* ignoreState = nullptr);
+    AnimGraphStateTransition* UpdateStateTransitions(AnimGraphContext& context, const AnimGraphNode::StateMachineData& stateMachineData, const AnimGraphNode::StateBaseData& stateData, AnimGraphNode* state, AnimGraphNode* ignoreState = nullptr);
     void UpdateStateTransitions(AnimGraphContext& context, const AnimGraphNode::StateMachineData& stateMachineData, AnimGraphInstanceData::StateMachineBucket& stateMachineBucket, const AnimGraphNode::StateBaseData& stateData);
 };

Source/Engine/Animations/Graph/AnimGroup.Animation.cpp

@@ -563,9 +563,13 @@ void AnimGraphExecutor::InitStateTransition(AnimGraphContext& context, AnimGraph
 }
 
 AnimGraphStateTransition* AnimGraphExecutor::UpdateStateTransitions(AnimGraphContext& context, const AnimGraphNode::StateMachineData& stateMachineData, AnimGraphNode* state, AnimGraphNode* ignoreState)
+{
+    return UpdateStateTransitions(context, stateMachineData, state->Data.State, state, ignoreState);
+}
+
+AnimGraphStateTransition* AnimGraphExecutor::UpdateStateTransitions(AnimGraphContext& context, const AnimGraphNode::StateMachineData& stateMachineData, const AnimGraphNode::StateBaseData& stateData, AnimGraphNode* state, AnimGraphNode* ignoreState)
 {
     int32 transitionIndex = 0;
-    const AnimGraphNode::StateBaseData& stateData = state->Data.State;
     while (transitionIndex < ANIM_GRAPH_MAX_STATE_TRANSITIONS && stateData.Transitions[transitionIndex] != AnimGraphNode::StateData::InvalidTransitionIndex)
     {
         const uint16 idx = stateData.Transitions[transitionIndex];
@@ -640,7 +644,7 @@ AnimGraphStateTransition* AnimGraphExecutor::UpdateStateTransitions(AnimGraphCon
 
 void AnimGraphExecutor::UpdateStateTransitions(AnimGraphContext& context, const AnimGraphNode::StateMachineData& stateMachineData, AnimGraphInstanceData::StateMachineBucket& stateMachineBucket, const AnimGraphNode::StateBaseData& stateData)
 {
-    AnimGraphStateTransition* transition = UpdateStateTransitions(context, stateMachineData, stateMachineBucket.CurrentState);
+    AnimGraphStateTransition* transition = UpdateStateTransitions(context, stateMachineData, stateData, stateMachineBucket.CurrentState);
     if (transition)
     {
         InitStateTransition(context, stateMachineBucket, transition);

Source/Engine/Animations/SceneAnimations/SceneAnimation.cpp

@@ -281,10 +281,26 @@ Asset::LoadResult SceneAnimation::load()
                 track.TrackStateIndex = TrackStatesCount++;
                 trackRuntime->PropertyName = stream.Move<char>(trackData->PropertyNameLength + 1);
                 trackRuntime->PropertyTypeName = stream.Move<char>(trackData->PropertyTypeNameLength + 1);
-                const int32 keyframesDataSize = trackData->KeyframesCount * (sizeof(float) + trackData->ValueSize);
+                int32 keyframesDataSize = trackData->KeyframesCount * (sizeof(float) + trackData->ValueSize);
+                if (trackData->ValueSize == 0)
+                {
+                    // When using json data (from non-POD types) read the sum of all keyframes data
+                    const int32 keyframesDataStart = stream.GetPosition();
+                    for (int32 j = 0; j < trackData->KeyframesCount; j++)
+                    {
+                        stream.Move<float>(); // Time
+                        int32 jsonLen;
+                        stream.ReadInt32(&jsonLen);
+                        stream.Move(jsonLen);
+                    }
+                    const int32 keyframesDataEnd = stream.GetPosition();
+                    stream.SetPosition(keyframesDataStart);
+                    keyframesDataSize = keyframesDataEnd - keyframesDataStart;
+                }
                 trackRuntime->ValueSize = trackData->ValueSize;
                 trackRuntime->KeyframesCount = trackData->KeyframesCount;
                 trackRuntime->Keyframes = stream.Move(keyframesDataSize);
+                trackRuntime->KeyframesSize = keyframesDataSize;
                 needsParent = true;
                 break;
             }
@@ -298,6 +314,7 @@ Asset::LoadResult SceneAnimation::load()
                 trackRuntime->PropertyName = stream.Move<char>(trackData->PropertyNameLength + 1);
                 trackRuntime->PropertyTypeName = stream.Move<char>(trackData->PropertyTypeNameLength + 1);
                 const int32 keyframesDataSize = trackData->KeyframesCount * (sizeof(float) + trackData->ValueSize * 3);
+                ASSERT(trackData->ValueSize > 0);
                 trackRuntime->ValueSize = trackData->ValueSize;
                 trackRuntime->KeyframesCount = trackData->KeyframesCount;
                 trackRuntime->Keyframes = stream.Move(keyframesDataSize);
@@ -375,6 +392,7 @@ Asset::LoadResult SceneAnimation::load()
                 trackRuntime->PropertyName = stream.Move<char>(trackData->PropertyNameLength + 1);
                 trackRuntime->PropertyTypeName = stream.Move<char>(trackData->PropertyTypeNameLength + 1);
                 trackRuntime->ValueSize = trackData->ValueSize;
+                ASSERT(trackData->ValueSize > 0);
                 trackRuntime->KeyframesCount = trackData->KeyframesCount;
                 const auto keyframesTimes = (float*)((byte*)trackRuntime + sizeof(StringPropertyTrack::Runtime));
                 const auto keyframesLengths = (int32*)((byte*)keyframesTimes + sizeof(float) * trackData->KeyframesCount);

Source/Engine/Animations/SceneAnimations/SceneAnimation.h

@@ -289,6 +289,7 @@ public:
             /// The keyframes array (items count is KeyframesCount). Each keyframe is represented by pair of time (of type float) and the value data (of size ValueSize).
             /// </summary>
             void* Keyframes;
+            int32 KeyframesSize;
         };
     };
 

Source/Engine/Animations/SceneAnimations/SceneAnimationPlayer.cpp

@@ -7,6 +7,7 @@
 #include "Engine/Level/SceneObjectsFactory.h"
 #include "Engine/Level/Actors/Camera.h"
 #include "Engine/Serialization/Serialization.h"
+#include "Engine/Serialization/MemoryReadStream.h"
 #include "Engine/Audio/AudioClip.h"
 #include "Engine/Audio/AudioSource.h"
 #include "Engine/Graphics/RenderTask.h"
@@ -19,6 +20,7 @@
 #include "Engine/Scripting/ManagedCLR/MField.h"
 #include "Engine/Scripting/ManagedCLR/MClass.h"
 #include "Engine/Scripting/ManagedCLR/MMethod.h"
+#include "Engine/Scripting/Internal/ManagedSerialization.h"
 
 // This could be Update, LateUpdate or FixedUpdate
 #define UPDATE_POINT Update
@@ -370,47 +372,96 @@ bool SceneAnimationPlayer::TickPropertyTrack(int32 trackIndex, int32 stateIndexO
     case SceneAnimation::Track::Types::KeyframesProperty:
     case SceneAnimation::Track::Types::ObjectReferenceProperty:
     {
-        const auto trackDataKeyframes = track.GetRuntimeData<SceneAnimation::KeyframesPropertyTrack::Runtime>();
+        const auto trackRuntime = track.GetRuntimeData<SceneAnimation::KeyframesPropertyTrack::Runtime>();
-        const int32 count = trackDataKeyframes->KeyframesCount;
+        const int32 count = trackRuntime->KeyframesCount;
         if (count == 0)
             return false;
 
-        // Find the keyframe at time
+        // If size is 0 then track uses Json storage for keyframes data (variable memory length of keyframes), otherwise it's optimized simple data with O(1) access
-        int32 keyframeSize = sizeof(float) + trackDataKeyframes->ValueSize;
+        if (trackRuntime->ValueSize != 0)
-#define GET_KEY_TIME(idx) *(float*)((byte*)trackDataKeyframes->Keyframes + keyframeSize * (idx))
-        const float keyTime = Math::Clamp(time, 0.0f, GET_KEY_TIME(count - 1));
-        int32 start = 0;
-        int32 searchLength = count;
-        while (searchLength > 0)
         {
-            const int32 half = searchLength >> 1;
+            // Find the keyframe at time (binary search)
-            int32 mid = start + half;
+            int32 keyframeSize = sizeof(float) + trackRuntime->ValueSize;
-            if (keyTime < GET_KEY_TIME(mid))
+#define GET_KEY_TIME(idx) *(float*)((byte*)trackRuntime->Keyframes + keyframeSize * (idx))
+            const float keyTime = Math::Clamp(time, 0.0f, GET_KEY_TIME(count - 1));
+            int32 start = 0;
+            int32 searchLength = count;
+            while (searchLength > 0)
             {
-                searchLength = half;
+                const int32 half = searchLength >> 1;
+                int32 mid = start + half;
+                if (keyTime < GET_KEY_TIME(mid))
+                {
+                    searchLength = half;
+                }
+                else
+                {
+                    start = mid + 1;
+                    searchLength -= half + 1;
+                }
+            }
+            int32 leftKey = Math::Max(0, start - 1);
+#undef GET_KEY_TIME
+
+            // Return the value
+            void* value = (void*)((byte*)trackRuntime->Keyframes + keyframeSize * (leftKey) + sizeof(float));
+            if (track.Type == SceneAnimation::Track::Types::ObjectReferenceProperty)
+            {
+                // Object ref track uses Guid for object Id storage
+                Guid id = *(Guid*)value;
+                _objectsMapping.TryGet(id, id);
+                auto obj = Scripting::FindObject<ScriptingObject>(id);
+                value = obj ? obj->GetOrCreateManagedInstance() : nullptr;
+                *(void**)target = value;
             }
             else
             {
-                start = mid + 1;
+                // POD memory
-                searchLength -= half + 1;
+                Platform::MemoryCopy(target, value, trackRuntime->ValueSize);
             }
         }
-        int32 leftKey = Math::Max(0, start - 1);
-#undef GET_KEY_TIME
-
-        // Return the value
-        void* value = (void*)((byte*)trackDataKeyframes->Keyframes + keyframeSize * (leftKey) + sizeof(float));
-        if (track.Type == SceneAnimation::Track::Types::ObjectReferenceProperty)
-        {
-            Guid id = *(Guid*)value;
-            _objectsMapping.TryGet(id, id);
-            auto obj = Scripting::FindObject<ScriptingObject>(id);
-            value = obj ? obj->GetOrCreateManagedInstance() : nullptr;
-            *(void**)target = value;
-        }
         else
         {
-            Platform::MemoryCopy(target, value, trackDataKeyframes->ValueSize);
+            // Clear pointer
+            *(void**)target = nullptr;
+
+            // Find the keyframe at time (linear search)
+            MemoryReadStream stream((byte*)trackRuntime->Keyframes, trackRuntime->KeyframesSize);
+            int32 prevKeyPos = sizeof(float);
+            int32 jsonLen;
+            for (int32 key = 0; key < count; key++)
+            {
+                float keyTime;
+                stream.ReadFloat(&keyTime);
+                if (keyTime > time)
+                    break;
+                prevKeyPos = stream.GetPosition();
+                stream.ReadInt32(&jsonLen);
+                stream.Move(jsonLen);
+            }
+
+            // Read json text
+            stream.SetPosition(prevKeyPos);
+            stream.ReadInt32(&jsonLen);
+            const StringAnsiView json((const char*)stream.GetPositionHandle(), jsonLen);
+
+            // Create empty value of the keyframe type
+            const auto trackData = track.GetData<SceneAnimation::KeyframesPropertyTrack::Data>();
+            const StringAnsiView propertyTypeName(trackRuntime->PropertyTypeName, trackData->PropertyTypeNameLength);
+            MClass* klass = Scripting::FindClass(propertyTypeName);
+            if (!klass)
+                return false;
+            MObject* obj = MCore::Object::New(klass);
+            if (!obj)
+                return false;
+            if (!klass->IsValueType())
+                MCore::Object::Init(obj);
+
+            // Deserialize value from json
+            ManagedSerialization::Deserialize(json, obj);
+
+            // Set value
+            *(void**)target = obj;
         }
         break;
     }
@@ -479,13 +530,13 @@ bool SceneAnimationPlayer::TickPropertyTrack(int32 trackIndex, int32 stateIndexO
     }
     case SceneAnimation::Track::Types::StringProperty:
     {
-        const auto trackDataKeyframes = track.GetRuntimeData<SceneAnimation::StringPropertyTrack::Runtime>();
+        const auto trackRuntime = track.GetRuntimeData<SceneAnimation::StringPropertyTrack::Runtime>();
-        const int32 count = trackDataKeyframes->KeyframesCount;
+        const int32 count = trackRuntime->KeyframesCount;
         if (count == 0)
             return false;
-        const auto keyframesTimes = (float*)((byte*)trackDataKeyframes + sizeof(SceneAnimation::StringPropertyTrack::Runtime));
+        const auto keyframesTimes = (float*)((byte*)trackRuntime + sizeof(SceneAnimation::StringPropertyTrack::Runtime));
-        const auto keyframesLengths = (int32*)((byte*)keyframesTimes + sizeof(float) * trackDataKeyframes->KeyframesCount);
+        const auto keyframesLengths = (int32*)((byte*)keyframesTimes + sizeof(float) * trackRuntime->KeyframesCount);
-        const auto keyframesValues = (Char**)((byte*)keyframesLengths + sizeof(int32) * trackDataKeyframes->KeyframesCount);
+        const auto keyframesValues = (Char**)((byte*)keyframesLengths + sizeof(int32) * trackRuntime->KeyframesCount);
 
         // Find the keyframe at time
 #define GET_KEY_TIME(idx) keyframesTimes[idx]
@@ -522,7 +573,7 @@ bool SceneAnimationPlayer::TickPropertyTrack(int32 trackIndex, int32 stateIndexO
             auto& childTrack = anim->Tracks[childTrackIndex];
             if (childTrack.Disabled || childTrack.ParentIndex != trackIndex)
                 continue;
-            const auto childTrackRuntimeData = childTrack.GetRuntimeData<SceneAnimation::PropertyTrack::Runtime>();
+            const auto childTrackRuntime = childTrack.GetRuntimeData<SceneAnimation::PropertyTrack::Runtime>();
             auto& childTrackState = _tracks[stateIndexOffset + childTrack.TrackStateIndex];
 
             // Cache field
@@ -532,7 +583,7 @@ bool SceneAnimationPlayer::TickPropertyTrack(int32 trackIndex, int32 stateIndexO
                 if (!type)
                     continue;
                 MClass* mclass = MCore::Type::GetClass(type);
-                childTrackState.Field = mclass->GetField(childTrackRuntimeData->PropertyName);
+                childTrackState.Field = mclass->GetField(childTrackRuntime->PropertyName);
                 if (!childTrackState.Field)
                     continue;
             }
@@ -956,7 +1007,8 @@ void SceneAnimationPlayer::Tick(SceneAnimation* anim, float time, float dt, int3
             if (TickPropertyTrack(j, stateIndexOffset, anim, time, track, state, value))
             {
                 // Set the value
-                if (MCore::Type::IsPointer(valueType))
+                auto valueTypes = MCore::Type::GetType(valueType);
+                if (valueTypes == MTypes::Object || MCore::Type::IsPointer(valueType))
                     value = (void*)*(intptr*)value;
                 if (state.Property)
                 {

Source/Engine/Content/Assets/RawDataAsset.cpp

@@ -69,7 +69,7 @@ uint64 RawDataAsset::GetMemoryUsage() const
     Locker.Lock();
     uint64 result = BinaryAsset::GetMemoryUsage();
     result += sizeof(RawDataAsset) - sizeof(BinaryAsset);
-    result += Data.Count();
+    result += Data.Capacity();
     Locker.Unlock();
     return result;
 }

Source/Engine/Content/Content.cpp

@@ -198,6 +198,12 @@ void ContentService::Dispose()
     Graphics::DisposeDevice();
 }
 
+IAssetFactory::Collection& IAssetFactory::Get()
+{
+    static Collection Factories(1024);
+    return Factories;
+}
+
 AssetsCache* Content::GetRegistry()
 {
     return &Cache;

Source/Engine/Content/Factories/IAssetFactory.h

@@ -20,11 +20,7 @@ public:
     /// <summary>
     /// Gets the all registered assets factories. Key is asset typename, value is the factory object.
     /// </summary>
-    static Collection& Get()
+    static Collection& Get();
-    {
-        static Collection Factories(1024);
-        return Factories;
-    }
 
 public:
     /// <summary>

Source/Engine/Debug/DebugDraw.cpp

@@ -943,6 +943,11 @@ void DebugDraw::DrawDirection(const Vector3& origin, const Vector3& direction, c
     DrawLine(origin, origin + direction, color, duration, depthTest);
 }
 
+void DebugDraw::DrawRay(const Vector3& origin, const Vector3& direction, const Color& color, float duration, bool depthTest)
+{
+    DrawLine(origin, origin + direction, color, duration, depthTest);
+}
+
 void DebugDraw::DrawRay(const Vector3& origin, const Vector3& direction, const Color& color, float length, float duration, bool depthTest)
 {
     if (isnan(length) || isinf(length))

Source/Engine/Debug/DebugDraw.h

@@ -87,6 +87,17 @@ API_CLASS(Static) class FLAXENGINE_API DebugDraw
     /// <param name="depthTest">If set to <c>true</c> depth test will be performed, otherwise depth will be ignored.</param>
     API_FUNCTION() static void DrawDirection(const Vector3& origin, const Vector3& direction, const Color& color = Color::White, float duration = 0.0f, bool depthTest = true);
 
+    /// <summary>
+    /// Draws the line in a direction.
+    /// [Deprecated in v1.8]
+    /// </summary>
+    /// <param name="origin">The origin of the line.</param>
+    /// <param name="direction">The direction of the line.</param>
+    /// <param name="color">The color.</param>
+    /// <param name="duration">The duration (in seconds). Use 0 to draw it only once.</param>
+    /// <param name="depthTest">If set to <c>true</c> depth test will be performed, otherwise depth will be ignored.</param>
+    API_FUNCTION() DEPRECATED static void DrawRay(const Vector3& origin, const Vector3& direction, const Color& color = Color::White, float duration = 0.0f, bool depthTest = true);
+
     /// <summary>
     /// Draws the line in a direction.
     /// </summary>

Source/Engine/Engine/InputAxis.cs

@@ -7,7 +7,7 @@ namespace FlaxEngine
     /// <summary>
     /// Virtual input axis binding. Helps with listening for a selected axis input.
     /// </summary>
-    public class InputAxis
+    public class InputAxis : IComparable, IComparable<InputAxis>
     {
         /// <summary>
         /// The name of the axis to use. See <see cref="Input.AxisMappings"/>.
@@ -47,13 +47,13 @@ namespace FlaxEngine
             Input.AxisValueChanged += Handler;
             Name = name;
         }
-        
+
         private void Handler(string name)
         {
             if (string.Equals(Name, name, StringComparison.OrdinalIgnoreCase))
                 ValueChanged?.Invoke();
         }
-        
+
         /// <summary>
         /// Finalizes an instance of the <see cref="InputAxis"/> class.
         /// </summary>
@@ -61,7 +61,7 @@ namespace FlaxEngine
         {
             Input.AxisValueChanged -= Handler;
         }
-        
+
         /// <summary>
         /// Releases this object.
         /// </summary>
@@ -70,5 +70,35 @@ namespace FlaxEngine
             Input.AxisValueChanged -= Handler;
             GC.SuppressFinalize(this);
         }
+
+        /// <inheritdoc />
+        public int CompareTo(InputAxis other)
+        {
+            return string.Compare(Name, other.Name, StringComparison.Ordinal);
+        }
+
+        /// <inheritdoc />
+        public int CompareTo(object obj)
+        {
+            return obj is InputAxis other ? CompareTo(other) : -1;
+        }
+
+        /// <inheritdoc />
+        public override int GetHashCode()
+        {
+            return Name?.GetHashCode() ?? 0;
+        }
+
+        /// <inheritdoc />
+        public override bool Equals(object obj)
+        {
+            return obj is InputAxis other && string.Equals(Name, other.Name, StringComparison.Ordinal);
+        }
+
+        /// <inheritdoc />
+        public override string ToString()
+        {
+            return Name;
+        }
     }
 }

Source/Engine/Engine/InputEvent.cs

@@ -7,7 +7,7 @@ namespace FlaxEngine
     /// <summary>
     /// Virtual input action binding. Helps with listening for a selected input event.
     /// </summary>
-    public class InputEvent
+    public class InputEvent : IComparable, IComparable<InputEvent>
     {
         /// <summary>
         /// The name of the action to use. See <see cref="Input.ActionMappings"/>.
@@ -21,7 +21,7 @@ namespace FlaxEngine
         public bool Active => Input.GetAction(Name);
 
         /// <summary>
-        /// Returns the event state. Use Use <see cref="Pressed"/>, <see cref="Pressing"/>, <see cref="Released"/> to catch events without active waiting.
+        /// Returns the event state. Use <see cref="Pressed"/>, <see cref="Pressing"/>, <see cref="Released"/> to catch events without active waiting.
         /// </summary>
         public InputActionState State => Input.GetActionState(Name);
 
@@ -35,12 +35,12 @@ namespace FlaxEngine
         /// Occurs when event is pressed (e.g. user pressed a key). Called before scripts update.
         /// </summary>
         public event Action Pressed;
-        
+
         /// <summary>
         /// Occurs when event is being pressing (e.g. user pressing a key). Called before scripts update.
         /// </summary>
         public event Action Pressing;
-        
+
         /// <summary>
         /// Occurs when event is released (e.g. user releases a key). Called before scripts update.
         /// </summary>
@@ -102,5 +102,35 @@ namespace FlaxEngine
             Input.ActionTriggered -= Handler;
             GC.SuppressFinalize(this);
         }
+
+        /// <inheritdoc />
+        public int CompareTo(InputEvent other)
+        {
+            return string.Compare(Name, other.Name, StringComparison.Ordinal);
+        }
+
+        /// <inheritdoc />
+        public int CompareTo(object obj)
+        {
+            return obj is InputEvent other ? CompareTo(other) : -1;
+        }
+
+        /// <inheritdoc />
+        public override int GetHashCode()
+        {
+            return Name?.GetHashCode() ?? 0;
+        }
+
+        /// <inheritdoc />
+        public override bool Equals(object obj)
+        {
+            return obj is InputEvent other && string.Equals(Name, other.Name, StringComparison.Ordinal);
+        }
+
+        /// <inheritdoc />
+        public override string ToString()
+        {
+            return Name;
+        }
     }
 }

Source/Engine/Engine/NativeInterop.cs

@@ -48,7 +48,7 @@ namespace FlaxEngine.Interop
 #endif
         private static Dictionary<object, ManagedHandle> classAttributesCacheCollectible = new();
         private static Dictionary<Assembly, ManagedHandle> assemblyHandles = new();
-        private static Dictionary<Type, int> _typeSizeCache = new();
+        private static ConcurrentDictionary<Type, int> _typeSizeCache = new();
 
         private static Dictionary<string, IntPtr> loadedNativeLibraries = new();
         internal static Dictionary<string, string> libraryPaths = new();
@@ -1594,7 +1594,7 @@ namespace FlaxEngine.Interop
             private static IntPtr PinValue<T>(T value) where T : struct
             {
                 // Store the converted value in unmanaged memory so it will not be relocated by the garbage collector.
-                int size = GetTypeSize(typeof(T));
+                int size = TypeHelpers<T>.MarshalSize;
                 uint index = Interlocked.Increment(ref pinnedAllocationsPointer) % (uint)pinnedAllocations.Length;
                 ref (IntPtr ptr, int size) alloc = ref pinnedAllocations[index];
                 if (alloc.size < size)
@@ -1727,25 +1727,36 @@ namespace FlaxEngine.Interop
             return tuple;
         }
 
-        internal static int GetTypeSize(Type type)
+        internal static class TypeHelpers<T>
         {
-            if (!_typeSizeCache.TryGetValue(type, out var size))
+            public static readonly int MarshalSize;
+            static TypeHelpers()
             {
+                Type type = typeof(T);
                 try
                 {
                     var marshalType = type;
                     if (type.IsEnum)
                         marshalType = type.GetEnumUnderlyingType();
-                    size = Marshal.SizeOf(marshalType);
+                    MarshalSize = Marshal.SizeOf(marshalType);
                 }
                 catch
                 {
                     // Workaround the issue where structure defined within generic type instance (eg. MyType<int>.MyStruct) fails to get size
                     // https://github.com/dotnet/runtime/issues/46426
-                    var obj = Activator.CreateInstance(type);
+                    var obj = RuntimeHelpers.GetUninitializedObject(type);
-                    size = Marshal.SizeOf(obj);
+                    MarshalSize = Marshal.SizeOf(obj);
                 }
-                _typeSizeCache.Add(type, size);
+            }
+        }
+
+        internal static int GetTypeSize(Type type)
+        {
+            if (!_typeSizeCache.TryGetValue(type, out int size))
+            {
+                var marshalSizeField = typeof(TypeHelpers<>).MakeGenericType(type).GetField(nameof(TypeHelpers<int>.MarshalSize), BindingFlags.Static | BindingFlags.Public);
+                size = (int)marshalSizeField.GetValue(null);
+                _typeSizeCache.AddOrUpdate(type, size, (t, v) => size);
             }
             return size;
         }

Source/Engine/Level/Actor.cpp

@@ -1764,14 +1764,6 @@ bool Actor::FromBytes(const Span<byte>& data, Array<Actor*>& output, ISerializeM
     }
     Scripting::ObjectsLookupIdMapping.Set(nullptr);
 
-    // Link objects
-    //for (int32 i = 0; i < objectsCount; i++)
-    {
-        //SceneObject* obj = sceneObjects->At(i);
-        // TODO: post load or post spawn?
-        //obj->PostLoad();
-    }
-
     // Update objects order
     //for (int32 i = 0; i < objectsCount; i++)
     {

Source/Engine/Level/Actor.cs

@@ -390,7 +390,7 @@ namespace FlaxEngine
         }
 
 #if FLAX_EDITOR
-        internal bool ShowTransform => !(this is UIControl);
+        private bool ShowTransform => !(this is UIControl);
 #endif
     }
 }

Source/Engine/Level/SceneObject.cpp

@@ -61,7 +61,7 @@ void SceneObject::BreakPrefabLink()
 
 String SceneObject::GetNamePath(Char separatorChar) const
 {
-    Array<String> names;
+    Array<StringView> names;
     const Actor* a = dynamic_cast<const Actor*>(this);
     if (!a)
         a = GetParent();
@@ -75,6 +75,8 @@ String SceneObject::GetNamePath(Char separatorChar) const
     int32 length = names.Count() - 1;
     for (int32 i = 0; i < names.Count(); i++)
         length += names[i].Length();
+    if (length == 0)
+        return String::Empty;
     String result;
     result.ReserveSpace(length);
     Char* ptr = result.Get();

Source/Engine/Level/SceneObjectsFactory.cpp

@@ -325,7 +325,7 @@ void SceneObjectsFactory::HandleObjectDeserializationError(const ISerializable::
                 dummyScript->Data = MoveTemp(bufferStr);
             }
 #endif
-            LOG(Warning, "Parent actor of the missing object: {0}", parent->GetName());
+            LOG(Warning, "Parent actor of the missing object: '{0}' ({1})", parent->GetNamePath(), String(parent->GetType().Fullname));
         }
     }
 #endif

Source/Engine/Level/SceneQuery.cpp

@@ -3,6 +3,7 @@
 #include "SceneQuery.h"
 #include "Engine/Scripting/Script.h"
 #include "Engine/Profiler/Profiler.h"
+#include "Scripts/MissingScript.h"
 
 Actor* SceneQuery::RaycastScene(const Ray& ray)
 {
@@ -51,6 +52,15 @@ bool GetAllSerializableSceneObjectsQuery(Actor* actor, Array<SceneObject*>& obje
         return false;
     objects.Add(actor);
     objects.Add(reinterpret_cast<SceneObject* const*>(actor->Scripts.Get()), actor->Scripts.Count());
+#if USE_EDITOR
+    // Skip saving Missing Script instances
+    for (int32 i = 0; i < actor->Scripts.Count(); i++)
+    {
+        const int32 idx = objects.Count() - i - 1;
+        if (objects.Get()[idx]->GetTypeHandle() == MissingScript::TypeInitializer)
+            objects.RemoveAtKeepOrder(idx);
+    }
+#endif
     return true;
 }
 

Source/Engine/Main/Default/main.cpp

@@ -11,7 +11,9 @@ int main(int argc, char* argv[])
     StringBuilder args;
     for (int i = 1; i < argc; i++)
     {
-        args.Append(argv[i]);
+        String arg;
+        arg.SetUTF8(argv[i], StringUtils::Length(argv[i]));
+        args.Append(arg);
 
         if (i + 1 != argc)
             args.Append(TEXT(' '));

Source/Engine/Navigation/NavCrowd.cpp

@@ -46,6 +46,7 @@ bool NavCrowd::Init(float maxAgentRadius, int32 maxAgents, NavMeshRuntime* navMe
 {
     if (!_crowd || !navMesh)
         return true;
+    PROFILE_CPU();
 
     // This can happen on game start when no navmesh is loaded yet (eg. navmesh tiles data is during streaming) so wait for navmesh
     if (navMesh->GetNavMesh() == nullptr)
@@ -145,6 +146,7 @@ void NavCrowd::ResetAgentMove(int32 id)
 
 void NavCrowd::RemoveAgent(int32 id)
 {
+    CHECK(id >= 0 && id < _crowd->getAgentCount());
     _crowd->removeAgent(id);
 }
 

Source/Engine/Networking/Components/NetworkTransform.h

@@ -10,7 +10,7 @@
 /// Actor script component that synchronizes the Transform over the network.
 /// </summary>
 /// <remarks>Interpolation and prediction logic based on https://www.gabrielgambetta.com/client-server-game-architecture.html.</remarks>
-API_CLASS(Namespace="FlaxEngine.Networking") class FLAXENGINE_API NetworkTransform : public Script, public INetworkSerializable
+API_CLASS(Namespace="FlaxEngine.Networking", Attributes="Category(\"Flax Engine\")") class FLAXENGINE_API NetworkTransform : public Script, public INetworkSerializable
 {
     API_AUTO_SERIALIZATION();
     DECLARE_SCRIPTING_TYPE(NetworkTransform);

Source/Engine/Physics/PhysX/PhysicsBackendPhysX.cpp

@@ -3469,7 +3469,8 @@ void* PhysicsBackend::CreateVehicle(WheeledVehicle* actor)
     Array<PxShape*, InlinedAllocation<8>> shapes;
     shapes.Resize(actorPhysX->getNbShapes());
     actorPhysX->getShapes(shapes.Get(), shapes.Count(), 0);
-    const PxTransform centerOfMassOffset = actorPhysX->getCMassLocalPose();
+    PxTransform centerOfMassOffset = actorPhysX->getCMassLocalPose();
+    centerOfMassOffset.q = PxQuat(PxIdentity);
 
     // Initialize wheels simulation data
     PxVec3 offsets[PX_MAX_NB_WHEELS];

Source/Engine/Platform/Base/PlatformBase.cpp

@@ -366,7 +366,13 @@ void PlatformBase::Error(const Char* msg)
 #if PLATFORM_HAS_HEADLESS_MODE
     if (CommandLine::Options.Headless)
     {
+#if PLATFORM_TEXT_IS_CHAR16
+        StringAnsi ansi(msg);
+        ansi += PLATFORM_LINE_TERMINATOR;
+        printf("Error: %s\n", ansi.Get());
+#else
         std::cout << "Error: " << msg << std::endl;
+#endif
     }
     else
 #endif

Source/Engine/Platform/Linux/LinuxFileSystem.cpp

@@ -28,8 +28,8 @@ const DateTime UnixEpoch(1970, 1, 1);
 
 bool LinuxFileSystem::ShowOpenFileDialog(Window* parentWindow, const StringView& initialDirectory, const StringView& filter, bool multiSelect, const StringView& title, Array<String, HeapAllocation>& filenames)
 {
-    const StringAsANSI<> initialDirectoryAnsi(*initialDirectory, initialDirectory.Length());
+    const StringAsUTF8<> initialDirectoryAnsi(*initialDirectory, initialDirectory.Length());
-    const StringAsANSI<> titleAnsi(*title, title.Length());
+    const StringAsUTF8<> titleAnsi(*title, title.Length());
     const char* initDir = initialDirectory.HasChars() ? initialDirectoryAnsi.Get() : ".";
     String xdgCurrentDesktop;
     StringBuilder fileFilter;
@@ -113,7 +113,7 @@ bool LinuxFileSystem::ShowOpenFileDialog(Window* parentWindow, const StringView&
 
 bool LinuxFileSystem::ShowBrowseFolderDialog(Window* parentWindow, const StringView& initialDirectory, const StringView& title, String& path)
 {
-    const StringAsANSI<> titleAnsi(*title, title.Length());
+    const StringAsUTF8<> titleAnsi(*title, title.Length());
     String xdgCurrentDesktop;
     Platform::GetEnvironmentVariable(TEXT("XDG_CURRENT_DESKTOP"), xdgCurrentDesktop);
 
@@ -158,7 +158,7 @@ bool LinuxFileSystem::ShowBrowseFolderDialog(Window* parentWindow, const StringV
 
 bool LinuxFileSystem::ShowFileExplorer(const StringView& path)
 {
-    const StringAsANSI<> pathAnsi(*path, path.Length());
+    const StringAsUTF8<> pathAnsi(*path, path.Length());
     char cmd[2048];
     sprintf(cmd, "xdg-open %s &", pathAnsi.Get());
     system(cmd);
@@ -167,7 +167,7 @@ bool LinuxFileSystem::ShowFileExplorer(const StringView& path)
 
 bool LinuxFileSystem::CreateDirectory(const StringView& path)
 {
-    const StringAsANSI<> pathAnsi(*path, path.Length());
+    const StringAsUTF8<> pathAnsi(*path, path.Length());
 
     // Skip if already exists
     struct stat fileInfo;
@@ -258,7 +258,7 @@ bool DeleteUnixPathTree(const char* path)
 
 bool LinuxFileSystem::DeleteDirectory(const String& path, bool deleteContents)
 {
-    const StringAsANSI<> pathANSI(*path, path.Length());
+    const StringAsUTF8<> pathANSI(*path, path.Length());
     if (deleteContents)
     {
         return DeleteUnixPathTree(pathANSI.Get());
@@ -272,7 +272,7 @@ bool LinuxFileSystem::DeleteDirectory(const String& path, bool deleteContents)
 bool LinuxFileSystem::DirectoryExists(const StringView& path)
 {
     struct stat fileInfo;
-    const StringAsANSI<> pathANSI(*path, path.Length());
+    const StringAsUTF8<> pathANSI(*path, path.Length());
     if (stat(pathANSI.Get(), &fileInfo) != -1)
     {
         return S_ISDIR(fileInfo.st_mode);
@@ -282,8 +282,8 @@ bool LinuxFileSystem::DirectoryExists(const StringView& path)
 
 bool LinuxFileSystem::DirectoryGetFiles(Array<String>& results, const String& path, const Char* searchPattern, DirectorySearchOption option)
 {
-    const StringAsANSI<> pathANSI(*path, path.Length());
+    const StringAsUTF8<> pathANSI(*path, path.Length());
-    const StringAsANSI<> searchPatternANSI(searchPattern);
+    const StringAsUTF8<> searchPatternANSI(searchPattern);
 
     // Check if use only top directory
     if (option == DirectorySearchOption::TopDirectoryOnly)
@@ -297,7 +297,7 @@ bool LinuxFileSystem::GetChildDirectories(Array<String>& results, const String&
     DIR* dir;
     struct stat statPath, statEntry;
     struct dirent* entry;
-    const StringAsANSI<> pathANSI(*directory, directory.Length());
+    const StringAsUTF8<> pathANSI(*directory, directory.Length());
     const char* path = pathANSI.Get();
 
     // Stat for the path
@@ -353,7 +353,7 @@ bool LinuxFileSystem::GetChildDirectories(Array<String>& results, const String&
 bool LinuxFileSystem::FileExists(const StringView& path)
 {
     struct stat fileInfo;
-    const StringAsANSI<> pathANSI(*path, path.Length());
+    const StringAsUTF8<> pathANSI(*path, path.Length());
     if (stat(pathANSI.Get(), &fileInfo) != -1)
     {
         return S_ISREG(fileInfo.st_mode);
@@ -363,7 +363,7 @@ bool LinuxFileSystem::FileExists(const StringView& path)
 
 bool LinuxFileSystem::DeleteFile(const StringView& path)
 {
-    const StringAsANSI<> pathANSI(*path, path.Length());
+    const StringAsUTF8<> pathANSI(*path, path.Length());
     return unlink(pathANSI.Get()) != 0;
 }
 
@@ -371,7 +371,7 @@ uint64 LinuxFileSystem::GetFileSize(const StringView& path)
 {
     struct stat fileInfo;
     fileInfo.st_size = 0;
-    const StringAsANSI<> pathANSI(*path, path.Length());
+    const StringAsUTF8<> pathANSI(*path, path.Length());
     if (stat(pathANSI.Get(), &fileInfo) != -1)
     {
         // Check for directories
@@ -385,7 +385,7 @@ uint64 LinuxFileSystem::GetFileSize(const StringView& path)
 
 bool LinuxFileSystem::IsReadOnly(const StringView& path)
 {
-    const StringAsANSI<> pathANSI(*path, path.Length());
+    const StringAsUTF8<> pathANSI(*path, path.Length());
     if (access(pathANSI.Get(), W_OK) == -1)
     {
         return errno == EACCES;
@@ -395,7 +395,7 @@ bool LinuxFileSystem::IsReadOnly(const StringView& path)
 
 bool LinuxFileSystem::SetReadOnly(const StringView& path, bool isReadOnly)
 {
-    const StringAsANSI<> pathANSI(*path, path.Length());
+    const StringAsUTF8<> pathANSI(*path, path.Length());
     struct stat fileInfo;
     if (stat(pathANSI.Get(), &fileInfo) != -1)
     {
@@ -422,15 +422,15 @@ bool LinuxFileSystem::MoveFile(const StringView& dst, const StringView& src, boo
 
     if (overwrite)
     {
-        unlink(StringAsANSI<>(*dst, dst.Length()).Get());
+        unlink(StringAsUTF8<>(*dst, dst.Length()).Get());
     }
-    if (rename(StringAsANSI<>(*src, src.Length()).Get(), StringAsANSI<>(*dst, dst.Length()).Get()) != 0)
+    if (rename(StringAsUTF8<>(*src, src.Length()).Get(), StringAsUTF8<>(*dst, dst.Length()).Get()) != 0)
     {
         if (errno == EXDEV)
         {
             if (!CopyFile(dst, src))
             {
-                unlink(StringAsANSI<>(*src, src.Length()).Get());
+                unlink(StringAsUTF8<>(*src, src.Length()).Get());
                 return false;
             }
         }
@@ -441,8 +441,8 @@ bool LinuxFileSystem::MoveFile(const StringView& dst, const StringView& src, boo
 
 bool LinuxFileSystem::CopyFile(const StringView& dst, const StringView& src)
 {
-    const StringAsANSI<> srcANSI(*src, src.Length());
+    const StringAsUTF8<> srcANSI(*src, src.Length());
-    const StringAsANSI<> dstANSI(*dst, dst.Length());
+    const StringAsUTF8<> dstANSI(*dst, dst.Length());
 
     int srcFile, dstFile;
     char buffer[4096];
@@ -752,7 +752,7 @@ bool LinuxFileSystem::getFilesFromDirectoryAll(Array<String>& results, const cha
 DateTime LinuxFileSystem::GetFileLastEditTime(const StringView& path)
 {
     struct stat fileInfo;
-    const StringAsANSI<> pathANSI(*path, path.Length());
+    const StringAsUTF8<> pathANSI(*path, path.Length());
     if (stat(pathANSI.Get(), &fileInfo) == -1)
     {
         return DateTime::MinValue();