_macdrag precleanup

# Conflicts:
#	Content/Editor/MaterialTemplates/Deformable.shader
#	Flax.flaxproj
#	Source/Engine/Content/Content.h
#	Source/Engine/Serialization/JsonTools.cpp

.github/ISSUE_TEMPLATE/1-bug.yaml

@@ -0,0 +1,42 @@
+name: Bug Report
+description: File a bug report.
+title: "[Bug]: "
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report! Please attach a minimal reproduction project if available!
+  - type: textarea
+    id: description-area
+    attributes:
+      label: Description
+      description: Please provide a description of the bug and what you expected to happen.
+    validations:
+      required: true
+  - type: textarea
+    id: steps-area
+    attributes:
+      label: Steps to reproduce
+      description: Please provide reproduction steps if available.
+    validations:
+      required: true
+  - type: dropdown
+    id: version
+    attributes:
+      label: Version
+      description: What version of Flax did you experience the bug in?
+      options:
+        - '1.9'
+        - '1.10'
+        - '1.11'
+        - '1.12'
+        - master branch
+      default: 3
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant logs
+      description: Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks.
+      render: shell

.github/ISSUE_TEMPLATE/2-feature-request.yaml

@@ -0,0 +1,22 @@
+name: Feature Request
+description: File a feature request.
+title: "[Request]: "
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for taking the time to submit this feature request!
+  - type: textarea
+    id: description-area
+    attributes:
+      label: Description
+      description: Please provide a description of the feature!
+    validations:
+      required: true
+  - type: textarea
+    id: benefits-area
+    attributes:
+      label: Benefits
+      description: Please list what benefits this feature would provide to the engine!
+    validations:
+      required: true

.github/data/bt.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+# https://gist.github.com/ongardie/aa15f1f0d0e6b59890a9
+gdb -q --batch \
+               -ex 'handle SIGHUP nostop pass' \
+               -ex 'handle SIGQUIT nostop pass' \
+               -ex 'handle SIGPIPE nostop pass' \
+               -ex 'handle SIGALRM nostop pass' \
+               -ex 'handle SIGTERM nostop pass' \
+               -ex 'handle SIGUSR1 nostop pass' \
+               -ex 'handle SIGUSR2 nostop pass' \
+               -ex 'handle SIGCHLD nostop pass' \
+               -ex 'handle SIG34 nostop pass' \
+               -ex 'set print thread-events off' \
+               -return-child-result \
+               -ex 'run' \
+               -ex 'thread apply all bt' \
+               --tty=/dev/stdout \
+               --args $*

.github/workflows/build_android.yml

@@ -4,6 +4,7 @@ on: [push, pull_request]
 env:
   DOTNET_NOLOGO: true
   DOTNET_CLI_TELEMETRY_OPTOUT: false
+  DOTNET_ROLL_FORWARD: 'minor'
 
 jobs:
 
@@ -19,7 +20,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 8.0.419
     - name: Setup .NET Workload
       run: |
         dotnet workload install android
@@ -33,4 +34,7 @@ jobs:
         git lfs pull
     - name: Build
       run: |
+        PowerShell "(Get-Content global.json).Replace('latestMajor', 'minor') | Set-Content global.json"
+        PowerShell "(Get-Content Source/Tools/Flax.Build/global.json).Replace('latestMajor', 'minor') | Set-Content Source/Tools/Flax.Build/global.json"
+        PowerShell "(Get-Content Source/Tools/Flax.Build/Flax.Build.csproj).Replace('LatestMajor', 'Minor') | Set-Content Source/Tools/Flax.Build/Flax.Build.csproj"
         .\Development\Scripts\Windows\CallBuildTool.bat -build -log -printSDKs -dotnet=8 -arch=ARM64 -platform=Android -configuration=Release -buildtargets=FlaxGame

.github/workflows/build_ios.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 9.0.x
     - name: Setup .NET Workload
       run: |
         dotnet workload install ios
@@ -33,4 +33,4 @@ jobs:
         git lfs pull
     - name: Build
       run: |
-        ./Development/Scripts/Mac/CallBuildTool.sh -build -log -dotnet=8 -arch=ARM64 -platform=iOS -configuration=Release -buildtargets=FlaxGame
+        ./Development/Scripts/Mac/CallBuildTool.sh -build -log -dotnet=9 -arch=ARM64 -platform=iOS -configuration=Release -buildtargets=FlaxGame

.github/workflows/build_linux.yml

@@ -16,7 +16,8 @@ jobs:
       uses: actions/checkout@v3
     - name: Install dependencies
       run: |
-        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev
+        sudo apt-get update
+        sudo apt-get install -y --fix-missing libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev libwayland-dev
     - name: Setup Vulkan
       uses: ./.github/actions/vulkan
     - name: Setup .NET
@@ -44,7 +45,8 @@ jobs:
       uses: actions/checkout@v3
     - name: Install dependencies
       run: |
-        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev
+        sudo apt-get update
+        sudo apt-get install -y --fix-missing libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev libwayland-dev
     - name: Setup Vulkan
       uses: ./.github/actions/vulkan
     - name: Setup .NET

.github/workflows/build_windows.yml

@@ -4,6 +4,7 @@ on: [push, pull_request]
 env:
   DOTNET_NOLOGO: true
   DOTNET_CLI_TELEMETRY_OPTOUT: false
+  DOTNET_ROLL_FORWARD: 'minor'
 
 jobs:
 
@@ -19,7 +20,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 8.0.419
     - name: Print .NET info
       run: |
         dotnet --info
@@ -30,6 +31,9 @@ jobs:
         git lfs pull
     - name: Build
       run: |
+        PowerShell "(Get-Content global.json).Replace('latestMajor', 'minor') | Set-Content global.json"
+        PowerShell "(Get-Content Source/Tools/Flax.Build/global.json).Replace('latestMajor', 'minor') | Set-Content Source/Tools/Flax.Build/global.json"
+        PowerShell "(Get-Content Source/Tools/Flax.Build/Flax.Build.csproj).Replace('LatestMajor', 'Minor') | Set-Content Source/Tools/Flax.Build/Flax.Build.csproj"
         .\Development\Scripts\Windows\CallBuildTool.bat -build -log -printSDKs -dotnet=8 -arch=x64 -platform=Windows -configuration=Development -buildtargets=FlaxEditor
 
   # Game
@@ -44,7 +48,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 8.0.419
     - name: Print .NET info
       run: |
         dotnet --info
@@ -55,4 +59,7 @@ jobs:
         git lfs pull
     - name: Build
       run: |
+        PowerShell "(Get-Content global.json).Replace('latestMajor', 'minor') | Set-Content global.json"
+        PowerShell "(Get-Content Source/Tools/Flax.Build/global.json).Replace('latestMajor', 'minor') | Set-Content Source/Tools/Flax.Build/global.json"
+        PowerShell "(Get-Content Source/Tools/Flax.Build/Flax.Build.csproj).Replace('LatestMajor', 'Minor') | Set-Content Source/Tools/Flax.Build/Flax.Build.csproj"
         .\Development\Scripts\Windows\CallBuildTool.bat -build -log -printSDKs -dotnet=8 -arch=x64 -platform=Windows -configuration=Release -buildtargets=FlaxGame

.github/workflows/cd.yml

@@ -7,6 +7,7 @@ on:
 env:
   DOTNET_NOLOGO: true
   DOTNET_CLI_TELEMETRY_OPTOUT: false
+  DOTNET_ROLL_FORWARD: 'minor'
   GIT_LFS_PULL_OPTIONS: '-c lfs.concurrenttransfers=1 -c lfs.transfer.maxretries=2 -c http.version="HTTP/1.1" -c lfs.activitytimeout=60'
 
 jobs:
@@ -27,13 +28,16 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 8.0.419
     - name: Print .NET info
       run: |
         dotnet --info
         dotnet workload --info
     - name: Build
       run: |
+        PowerShell "(Get-Content global.json).Replace('latestMajor', 'minor') | Set-Content global.json"
+        PowerShell "(Get-Content Source/Tools/Flax.Build/global.json).Replace('latestMajor', 'minor') | Set-Content Source/Tools/Flax.Build/global.json"
+        PowerShell "(Get-Content Source/Tools/Flax.Build/Flax.Build.csproj).Replace('LatestMajor', 'Minor') | Set-Content Source/Tools/Flax.Build/Flax.Build.csproj"
         .\PackageEditor.bat -arch=x64 -platform=Windows -deployOutput=Output -dotnet=8
     - name: Upload
       uses: actions/upload-artifact@v4
@@ -60,13 +64,16 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 8.0.419
     - name: Print .NET info
       run: |
         dotnet --info
         dotnet workload --info
     - name: Build
       run: |
+        PowerShell "(Get-Content global.json).Replace('latestMajor', 'minor') | Set-Content global.json"
+        PowerShell "(Get-Content Source/Tools/Flax.Build/global.json).Replace('latestMajor', 'minor') | Set-Content Source/Tools/Flax.Build/global.json"
+        PowerShell "(Get-Content Source/Tools/Flax.Build/Flax.Build.csproj).Replace('LatestMajor', 'Minor') | Set-Content Source/Tools/Flax.Build/Flax.Build.csproj"
         .\PackagePlatforms.bat -arch=x64 -platform=Windows -deployOutput=Output -dotnet=8
     - name: Upload
       uses: actions/upload-artifact@v4
@@ -87,7 +94,8 @@ jobs:
         git ${{ env.GIT_LFS_PULL_OPTIONS }} lfs pull
     - name: Install dependencies
       run: |
-        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev
+        sudo apt-get update
+        sudo apt-get install -y --fix-missing libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev libwayland-dev
     - name: Setup Vulkan
       uses: ./.github/actions/vulkan
     - name: Setup .NET
@@ -118,7 +126,8 @@ jobs:
         git ${{ env.GIT_LFS_PULL_OPTIONS }} lfs pull
     - name: Install dependencies
       run: |
-        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev
+        sudo apt-get update
+        sudo apt-get install -y --fix-missing libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev libwayland-dev
     - name: Setup Vulkan
       uses: ./.github/actions/vulkan
     - name: Setup .NET

.github/workflows/tests.yml

@@ -4,6 +4,7 @@ on: [push, pull_request]
 env:
   DOTNET_NOLOGO: true
   DOTNET_CLI_TELEMETRY_OPTOUT: false
+  DOTNET_ROLL_FORWARD: 'minor'
 
 jobs:
 
@@ -28,25 +29,23 @@ jobs:
         git lfs pull
     - name: Install dependencies
       run: |
-        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev
+        sudo apt-get update
+        sudo apt-get install -y --fix-missing libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev libwayland-dev gdb
+        chmod +x .github/data/bt.sh
     - name: Build
       run: |
         ./GenerateProjectFiles.sh -vs2022 -log -verbose -printSDKs -dotnet=8
-        ./Development/Scripts/Linux/CallBuildTool.sh -build -log -dotnet=8 -arch=x64 -platform=Linux -configuration=Development -buildtargets=FlaxTestsTarget
+        ./Development/Scripts/Linux/CallBuildTool.sh -build -log -dotnet=8 -arch=x64 -platform=Linux -configuration=Development -buildtargets=FlaxTestsTarget -UseLargeWorlds=true
         dotnet msbuild Source/Tools/Flax.Build.Tests/Flax.Build.Tests.csproj /m /t:Restore,Build /p:Configuration=Debug /p:Platform=AnyCPU /nologo
         dotnet msbuild Source/Tools/Flax.Build.Tests/Flax.Build.Tests.csproj /m /t:Restore,Build /p:Configuration=Debug /p:Platform=AnyCPU /nologo
     - name: Test
       run: |
-        ${GITHUB_WORKSPACE}/Binaries/Editor/Linux/Development/FlaxTests
+        ${GITHUB_WORKSPACE}/.github/data/bt.sh ./Binaries/Editor/Linux/Development/FlaxTests -headless
         dotnet test -f net8.0 Binaries/Tests/Flax.Build.Tests.dll
         cp Binaries/Editor/Linux/Development/FlaxEngine.CSharp.dll Binaries/Tests
         cp Binaries/Editor/Linux/Development/FlaxEngine.CSharp.runtimeconfig.json Binaries/Tests
         cp Binaries/Editor/Linux/Development/Newtonsoft.Json.dll Binaries/Tests
         dotnet test -f net8.0 Binaries/Tests/FlaxEngine.CSharp.dll
-    - name: Test UseLargeWorlds
-      run: |
-        ./Development/Scripts/Linux/CallBuildTool.sh -build -log -dotnet=8 -arch=x64 -platform=Linux -configuration=Development -buildtargets=FlaxTestsTarget -UseLargeWorlds=true
-        ${GITHUB_WORKSPACE}/Binaries/Editor/Linux/Development/FlaxTests
 
   # Tests on Windows
   tests-windows:
@@ -58,7 +57,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 8.0.419
     - name: Print .NET info
       run: |
         dotnet --info
@@ -69,6 +68,9 @@ jobs:
         git lfs pull
     - name: Build
       run: |
+        PowerShell "(Get-Content global.json).Replace('latestMajor', 'minor') | Set-Content global.json"
+        PowerShell "(Get-Content Source/Tools/Flax.Build/global.json).Replace('latestMajor', 'minor') | Set-Content Source/Tools/Flax.Build/global.json"
+        PowerShell "(Get-Content Source/Tools/Flax.Build/Flax.Build.csproj).Replace('LatestMajor', 'Minor') | Set-Content Source/Tools/Flax.Build/Flax.Build.csproj"
         .\GenerateProjectFiles.bat -vs2022 -log -verbose -printSDKs -dotnet=8
         .\Development\Scripts\Windows\CallBuildTool.bat -build -log -dotnet=8 -arch=x64 -platform=Windows -configuration=Development -buildtargets=FlaxTestsTarget
         dotnet msbuild Source\Tools\Flax.Build.Tests\Flax.Build.Tests.csproj /m /t:Restore,Build /p:Configuration=Debug /p:Platform=AnyCPU /nologo
@@ -76,7 +78,7 @@ jobs:
       shell: pwsh
       run: |
         $ErrorActionPreference = "Stop"
-        .\Binaries\Editor\Win64\Development\FlaxTests.exe
+        .\Binaries\Editor\Win64\Development\FlaxTests.exe -headless
         if(!$?) { Write-Host "Tests failed with exit code $LastExitCode" -ForegroundColor Red; Exit $LastExitCode }
         dotnet test -f net8.0 Binaries\Tests\Flax.Build.Tests.dll
         xcopy /y Binaries\Editor\Win64\Development\FlaxEngine.CSharp.dll Binaries\Tests

Content/Editor/MaterialTemplates/Decal.shader

@@ -6,6 +6,7 @@
 @3
 
 #include "./Flax/Common.hlsl"
+#include "./Flax/Stencil.hlsl"
 #include "./Flax/MaterialCommon.hlsl"
 #include "./Flax/GBufferCommon.hlsl"
 @7
@@ -13,11 +14,14 @@
 META_CB_BEGIN(0, Data)
 float4x4 WorldMatrix;
 float4x4 InvWorld;
-float4x4 SVPositionToWorld;
+float4x4 SvPositionToWorld;
+float3 Padding0;
+uint RenderLayersMask;
 @1META_CB_END
 
 // Use depth buffer for per-pixel decal layering
 Texture2D DepthBuffer : register(t0);
+Texture2D<uint2> StencilBuffer : register(t1);
 
 // Material shader resources
 @2
@@ -27,12 +31,63 @@ struct MaterialInput
 	float3 WorldPosition;
 	float TwoSidedSign;
 	float2 TexCoord;
+	float4 TexCoord_DDX_DDY;
 	float3x3 TBN;
 	float4 SvPosition;
 	float3 PreSkinnedPosition;
 	float3 PreSkinnedNormal;
 };
 
+// Calculates decal texcoords for a given pixel position (sampels depth buffer and projects value to decal space).
+float2 SvPositionToDecalUV(float4 svPosition)
+{
+	float2 screenUV = svPosition.xy * ScreenSize.zw;
+	svPosition.z = SAMPLE_RT_DEPTH(DepthBuffer, screenUV);
+	float4 positionHS = PROJECT_POINT(float4(svPosition.xyz, 1), SvPositionToWorld);
+	float3 positionWS = positionHS.xyz / positionHS.w;
+	float3 positionOS = PROJECT_POINT(float4(positionWS, 1), InvWorld).xyz;
+	return positionOS.xz + 0.5f;
+}
+
+// Manually compute ddx/ddy for decal texture cooordinates to avoid the 2x2 pixels artifacts on the edges of geometry under decal
+// [Reference: https://www.humus.name/index.php?page=3D&ID=84]
+float4 CalculateTextureDerivatives(float4 svPosition, float2 texCoord)
+{
+	float4 svDiffX = float4(1, 0, 0, 0);
+	float2 uvDiffX0 = texCoord - SvPositionToDecalUV(svPosition - svDiffX);
+	float2 uvDiffX1 = SvPositionToDecalUV(svPosition + svDiffX) - texCoord;
+	float2 dx = dot(uvDiffX0, uvDiffX0) < dot(uvDiffX1, uvDiffX1) ? uvDiffX0 : uvDiffX1;
+
+	float4 svDiffY = float4(0, 1, 0, 0);
+	float2 uvDiffY0 = texCoord - SvPositionToDecalUV(svPosition - svDiffY);
+	float2 uvDiffY1 = SvPositionToDecalUV(svPosition + svDiffY) - texCoord;
+	float2 dy = dot(uvDiffY0, uvDiffY0) < dot(uvDiffY1, uvDiffY1) ? uvDiffY0 : uvDiffY1;
+
+	return float4(dx, dy);
+}
+
+// Computes the mipmap level for a specific texture dimensions to be sampled at decal texture cooordinates.
+// [Reference: https://hugi.scene.org/online/coding/hugi%2014%20-%20comipmap.htm]
+float CalculateTextureMipmap(MaterialInput input, float2 textureSize)
+{
+	float2 dx = input.TexCoord_DDX_DDY.xy * textureSize;
+	float2 dy = input.TexCoord_DDX_DDY.zw * textureSize;
+	float d = max(dot(dx, dx), dot(dy, dy));
+	return (0.5 * 0.5) * log2(d); // Hardcoded half-mip rate reduction to avoid artifacts when decal is moved over dither texture
+}
+float CalculateTextureMipmap(MaterialInput input, Texture2D t)
+{
+	float2 textureSize;
+	t.GetDimensions(textureSize.x, textureSize.y);
+	return CalculateTextureMipmap(input, textureSize);
+}
+float CalculateTextureMipmap(MaterialInput input, TextureCube t)
+{
+	float2 textureSize;
+	t.GetDimensions(textureSize.x, textureSize.y);
+	return CalculateTextureMipmap(input, textureSize);
+}
+
 // Transforms a vector from tangent space to world space
 float3 TransformTangentVectorToWorld(MaterialInput input, float3 tangentVector)
 {
@@ -116,7 +171,6 @@ Material GetMaterialPS(MaterialInput input)
 }
 
 // Input macro specified by the material: DECAL_BLEND_MODE
-
 #define DECAL_BLEND_MODE_TRANSLUCENT 0
 #define DECAL_BLEND_MODE_STAIN       1
 #define DECAL_BLEND_MODE_NORMAL      2
@@ -128,10 +182,10 @@ META_VS_IN_ELEMENT(POSITION, 0, R32G32B32_FLOAT, 0, 0, PER_VERTEX, 0, true)
 void VS_Decal(in float3 Position : POSITION0, out float4 SvPosition : SV_Position)
 {
 	// Compute world space vertex position
-	float3 worldPosition = mul(float4(Position.xyz, 1), WorldMatrix).xyz;
+	float3 worldPosition = PROJECT_POINT(float4(Position.xyz, 1), WorldMatrix).xyz;
 
 	// Compute clip space position
-	SvPosition = mul(float4(worldPosition.xyz, 1), ViewProjectionMatrix);
+	SvPosition = PROJECT_POINT(float4(worldPosition.xyz, 1), ViewProjectionMatrix);
 }
 
 // Pixel Shader function for decals rendering
@@ -150,12 +204,20 @@ void PS_Decal(
 #endif
 	)
 {
-	float2 screenUV = SvPosition.xy * ScreenSize.zw;
-	SvPosition.z = SAMPLE_RT(DepthBuffer, screenUV).r;
+	// Stencil masking
+	uint stencilObjectLayer = STENCIL_BUFFER_OBJECT_LAYER(STENCIL_BUFFER_LOAD(StencilBuffer, SvPosition.xy));
+	if ((RenderLayersMask & (1 << stencilObjectLayer)) == 0)
+	{
+		clip(-1);
+		return;
+	}
 
-	float4 positionHS = mul(float4(SvPosition.xyz, 1), SVPositionToWorld);
+	float2 screenUV = SvPosition.xy * ScreenSize.zw;
+	SvPosition.z = SAMPLE_RT_DEPTH(DepthBuffer, screenUV);
+
+	float4 positionHS = PROJECT_POINT(float4(SvPosition.xyz, 1), SvPositionToWorld);
 	float3 positionWS = positionHS.xyz / positionHS.w;
-	float3 positionOS = mul(float4(positionWS, 1), InvWorld).xyz;
+	float3 positionOS = PROJECT_POINT(float4(positionWS, 1), InvWorld).xyz;
 
 	clip(0.5 - abs(positionOS.xyz));
 	float2 decalUVs = positionOS.xz + 0.5f;
@@ -166,8 +228,9 @@ void PS_Decal(
 	materialInput.TexCoord = decalUVs;
 	materialInput.TwoSidedSign = 1;
 	materialInput.SvPosition = SvPosition;
-	
-	// Build tangent to world transformation matrix
+	materialInput.TexCoord_DDX_DDY = CalculateTextureDerivatives(materialInput.SvPosition, materialInput.TexCoord);
+
+	// Calculate tangent-space
 	float3 ddxWp = ddx(positionWS);
 	float3 ddyWp = ddy(positionWS);
 	materialInput.TBN[0] = normalize(ddyWp);

Content/Editor/MaterialTemplates/Deformable.shader

@@ -308,7 +308,7 @@ VertexOutput VS_SplineModel(ModelInput input)
 	world = mul(world, WorldMatrix);
 
 	// Compute clip space position
-	output.Position = mul(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
 
 	// Pass vertex attributes
 	output.Geometry.TexCoord = input.TexCoord0;
@@ -337,8 +337,7 @@ VertexOutput VS_SplineModel(ModelInput input)
 	// Apply world position offset per-vertex
 #if USE_POSITION_OFFSET
 	output.Geometry.WorldPosition += material.PositionOffset;
-	output.Geometry.PrevWorldPosition += material.PositionOffset;
-	output.Position = mul(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
 #endif
 
 	// Get tessalation multiplier (per vertex)

Content/Editor/MaterialTemplates/Features/ForwardShading.hlsl

@@ -4,8 +4,8 @@
 #define MAX_LOCAL_LIGHTS 4
 @1// Forward Shading: Includes
 #include "./Flax/LightingCommon.hlsl"
-#if USE_REFLECTIONS
 #include "./Flax/ReflectionsCommon.hlsl"
+#if USE_REFLECTIONS
 #define MATERIAL_REFLECTIONS_SSR 1
 #if MATERIAL_REFLECTIONS == MATERIAL_REFLECTIONS_SSR
 #include "./Flax/SSR.hlsl"
@@ -14,11 +14,13 @@
 #include "./Flax/Lighting.hlsl"
 #include "./Flax/ShadowsSampling.hlsl"
 #include "./Flax/ExponentialHeightFog.hlsl"
+#include "./Flax/VolumetricFog.hlsl"
 @2// Forward Shading: Constants
 LightData DirectionalLight;
 LightData SkyLight;
-ProbeData EnvironmentProbe;
+EnvProbeData EnvironmentProbe;
 ExponentialHeightFogData ExponentialHeightFog;
+VolumetricFogData VolumetricFog;
 float3 Dummy2;
 uint LocalLightsCount;
 LightData LocalLights[MAX_LOCAL_LIGHTS];
@@ -27,12 +29,15 @@ TextureCube EnvProbe : register(t__SRV__);
 TextureCube SkyLightTexture : register(t__SRV__);
 Buffer<float4> ShadowsBuffer : register(t__SRV__);
 Texture2D<float> ShadowMap : register(t__SRV__);
+Texture3D VolumetricFogTexture : register(t__SRV__);
+Texture2D PreIntegratedGF : register(t__SRV__);
 @4// Forward Shading: Utilities
 // Public accessors for lighting data, use them as data binding might change but those methods will remain.
 LightData GetDirectionalLight() { return DirectionalLight; }
 LightData GetSkyLight() { return SkyLight; }
-ProbeData GetEnvironmentProbe() { return EnvironmentProbe; }
+EnvProbeData GetEnvironmentProbe() { return EnvironmentProbe; }
 ExponentialHeightFogData GetExponentialHeightFog() { return ExponentialHeightFog; }
+VolumetricFogData GetVolumetricFog() { return VolumetricFog; }
 uint GetLocalLightsCount() { return LocalLightsCount; }
 LightData GetLocalLight(uint i) { return LocalLights[i]; }
 @5// Forward Shading: Shaders
@@ -107,7 +112,8 @@ void PS_Forward(
 
 	// Calculate reflections
 #if USE_REFLECTIONS
-	float3 reflections = SampleReflectionProbe(ViewPos, EnvProbe, EnvironmentProbe, gBuffer.WorldPos, gBuffer.Normal, gBuffer.Roughness).rgb;
+	float4 reflections = SampleReflectionProbe(ViewPos, EnvProbe, EnvironmentProbe, gBuffer.WorldPos, gBuffer.Normal, gBuffer.Roughness);
+	reflections.rgb *= reflections.a;
 
 #if MATERIAL_REFLECTIONS == MATERIAL_REFLECTIONS_SSR
 	// Screen Space Reflections
@@ -115,7 +121,7 @@ void PS_Forward(
 	Texture2D sceneColorTexture = MATERIAL_REFLECTIONS_SSR_COLOR;
 	float2 screenUV = materialInput.SvPosition.xy * ScreenSize.zw;
 	float stepSize = ScreenSize.z; // 1 / screenWidth
-	float maxSamples = 48;
+	float maxSamples = 50;
 	float worldAntiSelfOcclusionBias = 0.1f;
 	float brdfBias = 0.82f;
 	float drawDistance = 5000.0f;
@@ -123,7 +129,7 @@ void PS_Forward(
 	if (hit.z > 0)
 	{
 		float3 screenColor = sceneColorTexture.SampleLevel(SamplerPointClamp, hit.xy, 0).rgb;
-		reflections = lerp(reflections, screenColor, hit.z);
+		reflections.rgb = lerp(reflections.rgb, screenColor, hit.z);
 	}
 
 	// Fallback to software tracing if possible
@@ -135,23 +141,37 @@ void PS_Forward(
 		if (TraceSDFSoftwareReflections(gBuffer, reflectWS, surfaceAtlas))
 		{
 			float3 screenColor = sceneColorTexture.SampleLevel(SamplerPointClamp, hit.xy, 0).rgb;
-        	reflections = lerp(surfaceAtlas, float4(screenColor, 1), hit.z);
+        	reflections.rgb = lerp(surfaceAtlas, float4(screenColor, 1), hit.z);
 		}
 	}
 #endif
 #endif
 
-	light.rgb += reflections * GetReflectionSpecularLighting(ViewPos, gBuffer) * light.a;	
+	light.rgb += reflections.rgb * GetReflectionSpecularLighting(PreIntegratedGF, ViewPos, gBuffer);
 #endif
 
-	// Add lighting (apply ambient occlusion)
-	output.rgb += light.rgb * gBuffer.AO;
+	// Add lighting
+	output.rgb += light.rgb;
 
 #endif
 
 #if USE_FOG && MATERIAL_SHADING_MODEL != SHADING_MODEL_UNLIT
 	// Calculate exponential height fog
-	float4 fog = GetExponentialHeightFog(ExponentialHeightFog, materialInput.WorldPosition, ViewPos, 0, gBuffer.ViewPos.z);
+#if DIRECTX && FEATURE_LEVEL < FEATURE_LEVEL_SM6
+	// TODO: fix D3D11/D3D10 bug with incorrect distance
+	float fogSceneDistance = distance(materialInput.WorldPosition, ViewPos);
+#else
+	float fogSceneDistance = gBuffer.ViewPos.z;
+#endif
+	float fogSkipDistance = max(ExponentialHeightFog.VolumetricFogMaxDistance - 100, 0);
+	float4 fog = GetExponentialHeightFog(ExponentialHeightFog, materialInput.WorldPosition, ViewPos, fogSkipDistance, fogSceneDistance);
+	if (ExponentialHeightFog.VolumetricFogMaxDistance > 0)
+	{
+		// Sample volumetric fog and mix it in
+		float2 screenUV = materialInput.SvPosition.xy * ScreenSize.zw;
+		float4 volumetricFog = SampleVolumetricFog(VolumetricFogTexture, VolumetricFog, materialInput.WorldPosition - ViewPos, screenUV, TemporalAAJitter);
+		fog = CombineVolumetricFog(fog, volumetricFog);
+	}
 
 	// Apply fog to the output color
 #if MATERIAL_BLEND == MATERIAL_BLEND_OPAQUE

Content/Editor/MaterialTemplates/GPUParticles.shader

@@ -67,7 +67,7 @@ float Rand(inout uint seed)
 float3 ReprojectPosition(float2 uv, float rawDepth)
 {
 	uv = uv * float2(2.0, -2.0) + float2(-1.0, 1.0);
-	float4 pos = mul(float4(uv.x, uv.y, rawDepth, 1.0f), InvViewProjectionMatrix);
+	float4 pos = PROJECT_POINT(float4(uv.x, uv.y, rawDepth, 1.0f), InvViewProjectionMatrix);
 	return pos.xyz / pos.w;
 }
 
@@ -158,7 +158,7 @@ void SpawnParticle(Context context)
 @4}
 
 // Main entry point for the particles simulation and spawning
-META_CS(true, FEATURE_LEVEL_SM5)
+META_CS(true, AUTO)
 [numthreads(THREAD_GROUP_SIZE, 1, 1)]
 void CS_Main(uint3 dispatchThreadId : SV_DispatchThreadID)
 {

Content/Editor/MaterialTemplates/GUI.shader

@@ -20,6 +20,8 @@ float TimeParam;
 float4 ViewInfo;
 float4 ScreenSize;
 float4 ViewSize;
+float3 ViewPadding0;
+float ScaledTimeParam;
 @1META_CB_END
 
 // Shader resources
@@ -36,6 +38,7 @@ struct VertexOutput
 #endif
 	float4 ClipExtents       : TEXCOORD3;
 	float2 ClipOrigin        : TEXCOORD4;
+    float2 CustomData        : TEXCOORD5; // x-per-geometry type, y-features mask
 #if USE_CUSTOM_VERTEX_INTERPOLATORS
 	float4 CustomVSToPS[CUSTOM_VERTEX_INTERPOLATORS_COUNT] : TEXCOORD9;
 #endif
@@ -53,6 +56,7 @@ struct PixelInput
 #endif
 	float4 ClipExtents       : TEXCOORD3;
 	float2 ClipOrigin        : TEXCOORD4;
+    float2 CustomData        : TEXCOORD5; // x-per-geometry type, y-features mask
 #if USE_CUSTOM_VERTEX_INTERPOLATORS
 	float4 CustomVSToPS[CUSTOM_VERTEX_INTERPOLATORS_COUNT] : TEXCOORD9;
 #endif
@@ -65,6 +69,7 @@ struct MaterialInput
 	float3 WorldPosition;
 	float TwoSidedSign;
 	float2 TexCoord;
+    float2 CustomData; // x-per-geometry type, y-features mask
 #if USE_VERTEX_COLOR
 	half4 VertexColor;
 #endif
@@ -82,6 +87,7 @@ MaterialInput GetMaterialInput(Render2DVertex input, VertexOutput output)
 	MaterialInput result;
 	result.WorldPosition = output.WorldPosition;
 	result.TexCoord = output.TexCoord;
+	result.CustomData = input.CustomDataAndClipOrigin.xy;
 #if USE_VERTEX_COLOR
 	result.VertexColor = output.VertexColor;
 #endif
@@ -101,6 +107,7 @@ MaterialInput GetMaterialInput(PixelInput input)
 	MaterialInput result;
 	result.WorldPosition = input.WorldPosition;
 	result.TexCoord = input.TexCoord;
+	result.CustomData = input.CustomData;
 #if USE_VERTEX_COLOR
 	result.VertexColor = input.VertexColor;
 #endif
@@ -220,13 +227,14 @@ VertexOutput VS_GUI(Render2DVertex input)
 	if ((int)input.CustomDataAndClipOrigin.y & 1)
 		input.Position = (int2)input.Position;
 
-	output.Position = mul(float4(input.Position, 0, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(input.Position, 0, 1), ViewProjectionMatrix);
 	output.WorldPosition = mul(float4(input.Position, 0, 1), WorldMatrix).xyz;
 	output.TexCoord = input.TexCoord;
 	output.WindowPos = input.Position;
 #if USE_VERTEX_COLOR
 	output.VertexColor = input.Color;
 #endif
+	output.CustomData = input.CustomDataAndClipOrigin.xy;
 	output.ClipOrigin = input.CustomDataAndClipOrigin.zw;
 	output.ClipExtents = input.ClipExtents;
 

Content/Editor/MaterialTemplates/Particle.shader

@@ -393,7 +393,7 @@ VertexOutput VS_Sprite(SpriteInput input, uint particleIndex : SV_InstanceID)
 	output.WorldPosition = position + spriteVertexPosition;
 
 	// Compute clip space position
-	output.Position = mul(float4(output.WorldPosition.xyz, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.WorldPosition.xyz, 1), ViewProjectionMatrix);
 
 	// Pass vertex attributes
 	output.TexCoord = input.TexCoord;
@@ -431,7 +431,7 @@ VertexOutput VS_Sprite(SpriteInput input, uint particleIndex : SV_InstanceID)
 	// Apply world position offset per-vertex
 #if USE_POSITION_OFFSET
 	output.WorldPosition += material.PositionOffset;
-	output.Position = mul(float4(output.WorldPosition.xyz, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.WorldPosition.xyz, 1), ViewProjectionMatrix);
 #endif
 
 	// Copy interpolants for other shader stages
@@ -511,7 +511,7 @@ VertexOutput VS_Model(ModelInput input, uint particleIndex : SV_InstanceID)
 	output.WorldPosition = mul(float4(input.Position, 1), world).xyz;
 
 	// Compute clip space position
-	output.Position = mul(float4(output.WorldPosition, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.WorldPosition, 1), ViewProjectionMatrix);
 
 	// Pass vertex attributes
 	output.TexCoord = input.TexCoord0;
@@ -549,7 +549,7 @@ VertexOutput VS_Model(ModelInput input, uint particleIndex : SV_InstanceID)
 	// Apply world position offset per-vertex
 #if USE_POSITION_OFFSET
 	output.WorldPosition += material.PositionOffset;
-	output.Position = mul(float4(output.WorldPosition.xyz, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.WorldPosition.xyz, 1), ViewProjectionMatrix);
 #endif
 
 	// Copy interpolants for other shader stages
@@ -617,7 +617,7 @@ VertexOutput VS_Ribbon(RibbonInput input, uint vertexIndex : SV_VertexID)
 	output.WorldPosition = position + tangentRight * vertexSign * (ribbonWidth.xxx * 0.5f);
 
 	// Compute clip space position
-	output.Position = mul(float4(output.WorldPosition.xyz, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.WorldPosition.xyz, 1), ViewProjectionMatrix);
 
 	// Pass vertex attributes
 	output.ParticleIndex = particleIndex;
@@ -645,7 +645,7 @@ VertexOutput VS_Ribbon(RibbonInput input, uint vertexIndex : SV_VertexID)
 	materialInput.TBN = output.TBN;
 	materialInput.TwoSidedSign = 1;
 	materialInput.SvPosition = output.Position;
-	materialInput.PreSkinnedPosition = Position;
+	materialInput.PreSkinnedPosition = position;
 	materialInput.PreSkinnedNormal = tangentToLocal[2].xyz;
 	materialInput.InstanceOrigin = output.InstanceOrigin;
 	materialInput.InstanceParams = output.InstanceParams;	
@@ -655,7 +655,7 @@ VertexOutput VS_Ribbon(RibbonInput input, uint vertexIndex : SV_VertexID)
 	// Apply world position offset per-vertex
 #if USE_POSITION_OFFSET
 	output.WorldPosition += material.PositionOffset;
-	output.Position = mul(float4(output.WorldPosition.xyz, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.WorldPosition.xyz, 1), ViewProjectionMatrix);
 #endif
 
 	// Copy interpolants for other shader stages

Content/Editor/MaterialTemplates/PostProcess.shader

@@ -19,6 +19,8 @@ float4 ViewInfo;
 float4 ScreenSize;
 float4 TemporalAAJitter;
 float4x4 InverseViewProjectionMatrix;
+float3 ViewPadding0;
+float ScaledTimeParam;
 @1META_CB_END
 
 // Shader resources

Content/Editor/MaterialTemplates/Surface.shader

@@ -342,7 +342,7 @@ VertexOutput VS(ModelInput input)
 	output.Geometry.PrevWorldPosition = mul(float4(input.Position.xyz, 1), object.PrevWorldMatrix).xyz;
 
 	// Compute clip space position
-	output.Position = mul(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
 
 	// Pass vertex attributes
 	output.Geometry.TexCoords01 = float4(input.TexCoord0, input.TexCoord1);
@@ -378,7 +378,7 @@ VertexOutput VS(ModelInput input)
 #if USE_POSITION_OFFSET
 	output.Geometry.WorldPosition += material.PositionOffset;
 	output.Geometry.PrevWorldPosition += material.PositionOffset;
-	output.Position = mul(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
 #endif
 
 	// Get tessalation multiplier (per vertex)
@@ -412,7 +412,7 @@ float4 VS_Depth(ModelInput_PosOnly input) : SV_Position
 
 	// Transform vertex position into the screen
 	float3 worldPosition = mul(float4(input.Position.xyz, 1), object.WorldMatrix).xyz;
-	float4 position = mul(float4(worldPosition, 1), ViewProjectionMatrix);
+	float4 position = PROJECT_POINT(float4(worldPosition, 1), ViewProjectionMatrix);
 	return position;
 }
 
@@ -518,7 +518,7 @@ VertexOutput VS_Skinned(ModelInput_Skinned input)
 #endif
 
 	// Compute clip space position
-	output.Position = mul(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
 
 	// Pass vertex attributes
 	output.Geometry.TexCoords01 = float4(input.TexCoord0, input.TexCoord1);
@@ -549,7 +549,7 @@ VertexOutput VS_Skinned(ModelInput_Skinned input)
 #if USE_POSITION_OFFSET
 	output.Geometry.WorldPosition += material.PositionOffset;
 	output.Geometry.PrevWorldPosition += material.PositionOffset;
-	output.Position = mul(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
 #endif
 
 	// Get tessalation multiplier (per vertex)

Content/Editor/MaterialTemplates/Terrain.shader

@@ -388,7 +388,7 @@ VertexOutput VS(TerrainVertexInput input)
 	output.Geometry.WorldPosition = mul(float4(position, 1), worldMatrix).xyz;
 
 	// Compute clip space position
-	output.Position = mul(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
 
 	// Pass vertex attributes
 #if USE_SMOOTH_LOD_TRANSITION
@@ -436,7 +436,7 @@ VertexOutput VS(TerrainVertexInput input)
 	// Apply world position offset per-vertex
 #if USE_POSITION_OFFSET
 	output.Geometry.WorldPosition += material.PositionOffset;
-	output.Position = mul(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
+	output.Position = PROJECT_POINT(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
 #endif
 
 	// Get tessalation multiplier (per vertex)

Content/Editor/MaterialTemplates/VolumeParticle.shader

@@ -8,6 +8,7 @@
 #include "./Flax/Common.hlsl"
 #include "./Flax/MaterialCommon.hlsl"
 #include "./Flax/GBufferCommon.hlsl"
+#include "./Flax/VolumetricFog.hlsl"
 @7
 
 // Primary constant buffer (with additional material parameters)
@@ -21,6 +22,7 @@ float Dummy0;
 float VolumetricFogMaxDistance;
 int ParticleStride;
 int ParticleIndex;
+float4 GridSliceParameters;
 @1META_CB_END
 
 // Particles attributes buffer
@@ -202,19 +204,19 @@ Material GetMaterialPS(MaterialInput input)
 META_PS(true, FEATURE_LEVEL_SM5)
 void PS_VolumetricFog(Quad_GS2PS input, out float4 VBufferA : SV_Target0, out float4 VBufferB : SV_Target1)
 {
+	// Reproject grid position back to the screen and world space
 	uint3 gridCoordinate = uint3(input.Vertex.Position.xy, input.LayerIndex);
 	float3 cellOffset = 0.5f;
 	float2 volumeUV = (gridCoordinate.xy + cellOffset.xy) / GridSize.xy;
-	float zSlice = gridCoordinate.z + cellOffset.z;
-	float sceneDepth = (zSlice / GridSize.z) * VolumetricFogMaxDistance / ViewFar;
+	float sceneDepth = GetDepthFromSlice(GridSliceParameters, gridCoordinate.z + cellOffset.z) / ViewFar;
 	float deviceDepth = (ViewInfo.w / sceneDepth) + ViewInfo.z;
 	float4 clipPos = float4(volumeUV * float2(2.0, -2.0) + float2(-1.0, 1.0), deviceDepth, 1.0);
 	float4 wsPos = mul(clipPos, InverseViewProjectionMatrix);
-	float3 positionWS = wsPos.xyz / wsPos.w;
+	wsPos.xyz /= wsPos.w;
 
 	// Get material parameters
 	MaterialInput materialInput = (MaterialInput)0;
-	materialInput.WorldPosition = positionWS;
+	materialInput.WorldPosition = wsPos.xyz;
 	materialInput.TexCoord = input.Vertex.TexCoord;
 	materialInput.ParticleIndex = ParticleIndex;
 	materialInput.TBN = float3x3(float3(1, 0, 0), float3(0, 1, 0), float3(0, 0, 1));
@@ -225,9 +227,10 @@ void PS_VolumetricFog(Quad_GS2PS input, out float4 VBufferA : SV_Target0, out fl
 	Material material = GetMaterialPS(materialInput);
 
 	// Compute fog properties
+	material.Opacity *= material.Mask;
 	float3 albedo = material.Color;
-	float extinction = material.Opacity * material.Mask * 0.001f;
-	float3 emission = material.Emissive;
+	float extinction = material.Opacity * 0.001f;
+	float3 emission = material.Emissive * material.Opacity;
 	float3 scattering = albedo * extinction;
 	float absorption = max(0.0f, extinction - Luminance(scattering));
 

Flax.flaxproj

@@ -2,17 +2,26 @@
   "Name": "Flax",
   "Version": {
     "Major": 1,
-    "Minor": 11,
+    "Minor": 12,
     "Revision": 0,
-    "Build": 6800
+    "Build": 6910
   },
   "Company": "Flax",
-  "Copyright": "Copyright (c) 2012-2025 Wojciech Figat. All rights reserved.",
+  "Copyright": "Copyright (c) 2012-2026 Wojciech Figat. All rights reserved.",
   "GameTarget": "FlaxGame",
   "EditorTarget": "FlaxEditor",
   "Configuration": {
     "UseCSharp": true,
     "UseLargeWorlds": false,
-    "UseDotNet": true
+    "UseDotNet": true,
+    "Windows": {
+      "UseSDL": false,
+    },
+    "Mac": {
+      "UseSDL": false,
+    },
+    "Linux": {
+      "UseSDL": true,
+    },
   }
-}
+}

Flax.sln.DotSettings

@@ -73,6 +73,24 @@
 	<s:String x:Key="/Default/CodeStyle/Naming/CppNaming/UserRules/=TYPEDEF/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="aa_bb" /&gt;</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CppNaming/UserRules/=UNION/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="aa_bb" /&gt;</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CppNaming/UserRules/=UNION_005FMEMBER/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="aa_bb" /&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Abbreviations/=CCD/@EntryIndexedValue">CCD</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Abbreviations/=GPU/@EntryIndexedValue">GPU</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Abbreviations/=ID/@EntryIndexedValue">ID</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=175CE9C669E52F4D92FD2C07848740BD/@EntryIndexedValue">&lt;NamingElement Priority="11" Title="Class and struct public fields"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="PUBLIC"&gt;&lt;type Name="class field" /&gt;&lt;type Name="struct field" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=32EB6D69783B3E4481A733193E338089/@EntryIndexedValue">&lt;NamingElement Priority="9" Title="Class and struct methods"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="member function" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=3C4E0D59F298854F9608A9B454E8FF5E/@EntryIndexedValue">&lt;NamingElement Priority="17" Title="Typedefs"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="type alias" /&gt;&lt;type Name="typedef" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=499C9026DADA2B448BCD0B2C54746A59/@EntryIndexedValue">&lt;NamingElement Priority="14" Title="Other constants"&gt;&lt;Descriptor Static="True" Constexpr="Indeterminate" Const="True" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="class field" /&gt;&lt;type Name="local variable" /&gt;&lt;type Name="struct field" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
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+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=C03AE454FC2CBA43819AC75E4D6C9C8C/@EntryIndexedValue">&lt;NamingElement Priority="1" Title="Classes and structs"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="__interface" /&gt;&lt;type Name="class" /&gt;&lt;type Name="struct" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=D49E31C610641E4CAD0407DB79ACC851/@EntryIndexedValue">&lt;NamingElement Priority="8" Title="Global functions"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="global function" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=D73FBB3529BC5449B6C85BB37B26A8D4/@EntryIndexedValue">&lt;NamingElement Priority="16" Title="Namespaces"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="namespace" /&gt;&lt;type Name="namespace alias" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=DA41807CE47AEB4CBE1724C44D0B786E/@EntryIndexedValue">&lt;NamingElement Priority="6" Title="Local variables"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="local variable" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="aaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=DDF30C9A1DA74B4DBBC56D25FDF886AA/@EntryIndexedValue">&lt;NamingElement Priority="10" Title="Class and struct fields"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="class field" /&gt;&lt;type Name="struct field" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="_" Suffix="" Style="aaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=EF70A6BF54ACE446971DDB32344C25A3/@EntryIndexedValue">&lt;NamingElement Priority="12" Title="Union members"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="union member" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=F37818C54C323A4A80B1A478629985AE/@EntryIndexedValue">&lt;NamingElement Priority="2" Title="Enums"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="enum" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=AI/@EntryIndexedValue">AI</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=ARGB/@EntryIndexedValue">ARGB</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=LO/@EntryIndexedValue">LO</s:String>
@@ -170,7 +188,7 @@
 	<s:Boolean x:Key="/Default/CodeStyle/CodeFormatting/CSharpFormat/PLACE_FIELD_ATTRIBUTE_ON_SAME_LINE/@EntryValue">False</s:Boolean>
 	<s:String x:Key="/Default/CodeStyle/CodeFormatting/CSharpFormat/PLACE_FIELD_ATTRIBUTE_ON_SAME_LINE_EX/@EntryValue">NEVER</s:String>
 	<s:Boolean x:Key="/Default/CodeStyle/CodeFormatting/CSharpFormat/PLACE_SIMPLE_ACCESSOR_ATTRIBUTE_ON_SAME_LINE/@EntryValue">False</s:Boolean>
-	<s:String x:Key="/Default/CodeStyle/CodeFormatting/CSharpFormat/PLACE_SIMPLE_CASE_STATEMENT_ON_SAME_LINE/@EntryValue">ALWAYS</s:String>
+	
 	<s:String x:Key="/Default/CodeStyle/CodeFormatting/CSharpFormat/PLACE_SIMPLE_EMBEDDED_STATEMENT_ON_SAME_LINE/@EntryValue">NEVER</s:String>
 	<s:String x:Key="/Default/CodeStyle/CodeFormatting/CSharpFormat/SIMPLE_CASE_STATEMENT_STYLE/@EntryValue">ON_SINGLE_LINE</s:String>
 	<s:Boolean x:Key="/Default/CodeStyle/CodeFormatting/CSharpFormat/SPACE_AFTER_TYPECAST_PARENTHESES/@EntryValue">False</s:Boolean>
@@ -213,6 +231,7 @@
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=YZ/@EntryIndexedValue">YZ</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/PredefinedNamingRules/=PublicFields/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="AaBb"&gt;&lt;ExtraRule Prefix="_" Suffix="" Style="aaBb" /&gt;&lt;/Policy&gt;</s:String>
 	<s:String x:Key="/Default/Environment/Hierarchy/PsiConfigurationSettingsKey/CustomLocation/@EntryValue">C:\Users\Wojtek\AppData\Local\JetBrains\Transient\ReSharperPlatformVs15\v08_f9eacea9\SolutionCaches</s:String>
+	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EFeature_002EServices_002ECpp_002ECodeStyle_002ENaming_002ECppNamingOptionsMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EFeature_002EServices_002ECpp_002ECodeStyle_002ESettingsUpgrade_002EFunctionReturnStyleSettingsUpgrader/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EFeature_002EServices_002ECpp_002ECodeStyle_002ESettingsUpgrade_002ENamespaceIndentationSettingsUpgrader/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpAttributeForSingleLineMethodUpgrade/@EntryIndexedValue">True</s:Boolean>

ISSUE_TEMPLATE.md

@@ -1,19 +0,0 @@
-<!-- Please search existing issues for potential duplicates before filing yours:
-https://github.com/flaxengine/FlaxEngine/issues?q=is%3Aissue
--->
-
-**Issue description:**
-<!-- What happened, and what was expected. -->
-<!-- Log file, can be found in the project directory's `Logs` folder (optional) -->
-
-**Steps to reproduce:**
-<!-- Enter minimal reproduction steps if available. -->
-
-
-**Minimal reproduction project:**
-<!-- Recommended as it greatly speeds up debugging. Drag and drop a zip archive to upload it. -->
-
-
-**Flax version:**
-<!-- Specify version number. -->
-

README.md

@@ -49,7 +49,7 @@ Follow the instructions below to compile and run the engine from source.
   * Fedora: `sudo dnf install dotnet-sdk-8.0`
   * Arch: `sudo pacman -S dotnet-sdk-8.0 dotnet-runtime-8.0 dotnet-targeting-pack-8.0 dotnet-host`
 * Install Vulkan SDK ([https://vulkan.lunarg.com/](https://vulkan.lunarg.com/))
-  * Ubuntu: `sudo apt install vulkan-sdk`
+  * Ubuntu: `sudo apt install vulkan-sdk` (deprecated, follow official docs)
   * Fedora: `sudo dnf install vulkan-headers vulkan-tools vulkan-validation-layers`
   * Arch: `sudo pacman -S vulkan-headers vulkan-tools vulkan-validation-layers`
 * Install Git with LFS
@@ -60,7 +60,7 @@ Follow the instructions below to compile and run the engine from source.
   * Ubuntu: `sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev zlib1g-dev`
   * Fedora: `sudo dnf install libX11-devel libXcursor-devel  libXinerama-devel ghc-zlib-devel`
   * Arch: `sudo pacman -S base-devel libx11 libxcursor libxinerama zlib`
-* Install Clang compiler (version 6 or later):
+* Install Clang compiler (version 14 or later):
   * Ubuntu: `sudo apt-get install clang lldb lld`
   * Fedora: `sudo dnf install clang llvm lldb lld`
   * Arch: `sudo pacman -S clang lldb lld`

Source/Editor/Content/Create/PrefabCreateEntry.cs

@@ -117,7 +117,8 @@ namespace FlaxEditor.Content.Create
 
             private static bool IsValid(Type type)
             {
-                return (type.IsPublic || type.IsNestedPublic) && !type.IsAbstract && !type.IsGenericType;
+                var controlTypes = Editor.Instance.CodeEditing.Controls.Get();
+                return (type.IsPublic || type.IsNestedPublic) && !type.IsAbstract && !type.IsGenericType && controlTypes.Contains(new ScriptType(type));
             }
         }
 

Source/Editor/Content/GUI/ContentNavigation.cs

@@ -19,7 +19,7 @@ namespace FlaxEditor.Content.GUI
         /// <summary>
         /// Gets the target node.
         /// </summary>
-        public ContentTreeNode TargetNode { get; }
+        public ContentFolderTreeNode TargetNode { get; }
 
         /// <summary>
         /// Initializes a new instance of the <see cref="ContentNavigationButton"/> class.
@@ -28,7 +28,7 @@ namespace FlaxEditor.Content.GUI
         /// <param name="x">The x position.</param>
         /// <param name="y">The y position.</param>
         /// <param name="height">The height.</param>
-        public ContentNavigationButton(ContentTreeNode targetNode, float x, float y, float height)
+        public ContentNavigationButton(ContentFolderTreeNode targetNode, float x, float y, float height)
         : base(x, y, height)
         {
             TargetNode = targetNode;
@@ -147,7 +147,7 @@ namespace FlaxEditor.Content.GUI
             ClearItems();
             foreach (var child in Target.TargetNode.Children)
             {
-                if (child is ContentTreeNode node)
+                if (child is ContentFolderTreeNode node)
                 {
                     if (node.Folder.VisibleInHierarchy) // Respect the filter set by ContentFilterConfig.Filter(...)
                         AddItem(node.Folder.ShortName);
@@ -180,7 +180,7 @@ namespace FlaxEditor.Content.GUI
             var item = _items[index];
             foreach (var child in Target.TargetNode.Children)
             {
-                if (child is ContentTreeNode node && node.Folder.ShortName == item)
+                if (child is ContentFolderTreeNode node && node.Folder.ShortName == item)
                 {
                     Editor.Instance.Windows.ContentWin.Navigate(node);
                     return;

Source/Editor/Content/Import/TextureImportEntry.cs

@@ -187,6 +187,11 @@ namespace FlaxEditor.Content.Import
                 // Glossiness, metalness, ambient occlusion, displacement, height, cavity or specular
                 _settings.Settings.Type = TextureFormatType.GrayScale;
             }
+            else if (_settings.Settings.Type == TextureFormatType.ColorRGB)
+            {
+                // Blind guess that common color texture is sRGB
+                _settings.Settings.sRGB = true;
+            }
 
             // Try to restore target asset texture import options (useful for fast reimport)
             Editor.TryRestoreImportOptions(ref _settings.Settings, ResultUrl);

Source/Editor/Content/Items/ContentFolder.cs

@@ -59,7 +59,7 @@ namespace FlaxEditor.Content
         /// <summary>
         /// Gets the content node.
         /// </summary>
-        public ContentTreeNode Node { get; }
+        public ContentFolderTreeNode Node { get; }
 
         /// <summary>
         /// The subitems of this folder.
@@ -72,7 +72,7 @@ namespace FlaxEditor.Content
         /// <param name="type">The folder type.</param>
         /// <param name="path">The path to the item.</param>
         /// <param name="node">The folder parent node.</param>
-        internal ContentFolder(ContentFolderType type, string path, ContentTreeNode node)
+        internal ContentFolder(ContentFolderType type, string path, ContentFolderTreeNode node)
         : base(path)
         {
             FolderType = type;
@@ -118,7 +118,7 @@ namespace FlaxEditor.Content
             get
             {
                 var hasParentFolder = ParentFolder != null;
-                var isContentFolder = Node is MainContentTreeNode;
+                var isContentFolder = Node is MainContentFolderTreeNode;
                 return hasParentFolder && !isContentFolder;
             }
         }
@@ -282,7 +282,7 @@ namespace FlaxEditor.Content
 
             if (data is DragDataFiles)
                 return DragDropEffect.Copy;
-            return _dragOverItems.Effect;
+            return _dragOverItems?.Effect ?? DragDropEffect.None;
         }
 
         /// <inheritdoc />

Source/Editor/Content/Items/CppScriptItem.cs

@@ -20,7 +20,7 @@ namespace FlaxEditor.Content
         }
 
         /// <inheritdoc />
-        public override string TypeDescription => Path.EndsWith(".h") ? "C++ Header File" : "C++ Source Code";
+        public override string TypeDescription => Path.EndsWith(".h") || Path.EndsWith(".hpp") ? "C++ Header File" : "C++ Source Code";
 
         /// <inheritdoc />
         public override SpriteHandle DefaultThumbnail => Editor.Instance.Icons.CPPScript128;

Source/Editor/Content/Items/VisualScriptItem.cs

@@ -281,6 +281,13 @@ namespace FlaxEditor.Content
 
         private void CacheData()
         {
+            if (!_asset)
+            {
+                _parameters = Utils.GetEmptyArray<ScriptMemberInfo>();
+                _methods = Utils.GetEmptyArray<ScriptMemberInfo>();
+                _attributes = Utils.GetEmptyArray<Attribute>();
+                return;
+            }
             if (_parameters != null)
                 return;
             if (_asset.WaitForLoaded())
@@ -344,13 +351,13 @@ namespace FlaxEditor.Content
         }
 
         /// <inheritdoc />
-        public string Name => Path.GetFileNameWithoutExtension(_asset.Path);
+        public string Name => _asset ? Path.GetFileNameWithoutExtension(_asset.Path) : null;
 
         /// <inheritdoc />
         public string Namespace => string.Empty;
 
         /// <inheritdoc />
-        public string TypeName => JsonSerializer.GetStringID(_asset.ID);
+        public string TypeName => _asset ? JsonSerializer.GetStringID(_asset.ID) : null;
 
         /// <inheritdoc />
         public bool IsPublic => true;

Source/Editor/Content/Proxy/AssetProxy.cs

@@ -130,6 +130,11 @@ namespace FlaxEditor.Content
             eyeAdaptation.Mode = EyeAdaptationMode.None;
             eyeAdaptation.OverrideFlags |= EyeAdaptationSettingsOverride.Mode;
             preview.PostFxVolume.EyeAdaptation = eyeAdaptation;
+
+            var antiAliasing = preview.PostFxVolume.AntiAliasing;
+            antiAliasing.Mode = AntialiasingMode.FastApproximateAntialiasing;
+            antiAliasing.OverrideFlags |= AntiAliasingSettingsOverride.Mode;
+            preview.PostFxVolume.AntiAliasing = antiAliasing;
         }
     }
 }

Source/Editor/Content/Thumbnails/ThumbnailsModule.cs

@@ -45,6 +45,8 @@ namespace FlaxEditor.Content.Thumbnails
         {
             if (item == null)
                 throw new ArgumentNullException();
+            if (_task == null)
+                return;
 
             // Check if use default icon
             var defaultThumbnail = item.DefaultThumbnail;
@@ -223,11 +225,12 @@ namespace FlaxEditor.Content.Thumbnails
         /// <inheritdoc />
         public override void OnInit()
         {
+            if (Editor.IsHeadlessMode || (GPUDevice.Instance != null && GPUDevice.Instance.RendererType == RendererType.Null))
+                return;
+
             // Create cache folder
             if (!Directory.Exists(_cacheFolder))
-            {
                 Directory.CreateDirectory(_cacheFolder);
-            }
 
             // Find atlases in a Editor cache directory
             var files = Directory.GetFiles(_cacheFolder, "cache_*.flax", SearchOption.TopDirectoryOnly);
@@ -482,7 +485,7 @@ namespace FlaxEditor.Content.Thumbnails
         public override void OnUpdate()
         {
             // Wait some frames before start generating previews (late init feature)
-            if (Time.TimeSinceStartup < 1.0f || HasAllAtlasesLoaded() == false)
+            if (Time.TimeSinceStartup < 1.0f || HasAllAtlasesLoaded() == false || _task == null)
                 return;
 
             lock (_requests)

Source/Editor/Content/Tree/ContentFolderTreeNode.cs

@@ -0,0 +1,433 @@
+// Copyright (c) Wojciech Figat. All rights reserved.
+
+using System;
+using System.Collections.Generic;
+using FlaxEditor.GUI;
+using FlaxEditor.GUI.Drag;
+using FlaxEditor.GUI.Tree;
+using FlaxEditor.SceneGraph;
+using FlaxEditor.Utilities;
+using FlaxEngine;
+using FlaxEngine.GUI;
+
+namespace FlaxEditor.Content;
+
+/// <summary>
+/// Content folder tree node.
+/// </summary>
+/// <seealso cref="TreeNode" />
+public class ContentFolderTreeNode : TreeNode
+{
+    private DragItems _dragOverItems;
+    private DragActors _dragActors;
+    private List<Rectangle> _highlights;
+
+    /// <summary>
+    /// The folder.
+    /// </summary>
+    protected ContentFolder _folder;
+
+    /// <summary>
+    /// Whether this node can be deleted.
+    /// </summary>
+    public virtual bool CanDelete => true;
+    
+    /// <summary>
+    /// Whether this node can be duplicated.
+    /// </summary>
+    public virtual bool CanDuplicate => true;
+
+    /// <summary>
+    /// Gets the content folder item.
+    /// </summary>
+    public ContentFolder Folder => _folder;
+
+    /// <summary>
+    /// Gets the type of the folder.
+    /// </summary>
+    public ContentFolderType FolderType => _folder.FolderType;
+
+    /// <summary>
+    /// Returns true if that folder can import/manage scripts.
+    /// </summary>
+    public bool CanHaveScripts => _folder.CanHaveScripts;
+
+    /// <summary>
+    /// Returns true if that folder can import/manage assets.
+    /// </summary>
+    /// <returns>True if can contain assets for project, otherwise false</returns>
+    public bool CanHaveAssets => _folder.CanHaveAssets;
+
+    /// <summary>
+    /// Gets the parent node.
+    /// </summary>
+    public ContentFolderTreeNode ParentNode => Parent as ContentFolderTreeNode;
+
+    /// <summary>
+    /// Gets the folder path.
+    /// </summary>
+    public string Path => _folder.Path;
+
+    /// <summary>
+    /// Gets the navigation button label.
+    /// </summary>
+    public virtual string NavButtonLabel => _folder.ShortName;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ContentFolderTreeNode"/> class.
+    /// </summary>
+    /// <param name="parent">The parent node.</param>
+    /// <param name="path">The folder path.</param>
+    public ContentFolderTreeNode(ContentFolderTreeNode parent, string path)
+    : this(parent, parent?.FolderType ?? ContentFolderType.Other, path)
+    {
+    }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ContentFolderTreeNode"/> class.
+    /// </summary>
+    /// <param name="parent">The parent node.</param>
+    /// <param name="type">The folder type.</param>
+    /// <param name="path">The folder path.</param>
+    protected ContentFolderTreeNode(ContentFolderTreeNode parent, ContentFolderType type, string path)
+    : base(false, Editor.Instance.Icons.FolderClosed32, Editor.Instance.Icons.FolderOpen32)
+    {
+        _folder = new ContentFolder(type, path, this);
+        Text = _folder.ShortName;
+        if (parent != null)
+        {
+            Folder.ParentFolder = parent.Folder;
+            Parent = parent;
+        }
+        IconColor = Color.Transparent; // Hide default icon, we draw scaled icon manually
+        UpdateCustomArrowRect();
+        Editor.Instance?.Windows?.ContentWin?.TryAutoExpandContentNode(this);
+    }
+    
+    /// <summary>
+    /// Updates the custom arrow rectangle so it stays aligned with the current layout.
+    /// </summary>
+    private void UpdateCustomArrowRect()
+    {
+        var contentWindow = Editor.Instance?.Windows?.ContentWin;
+        var scale = contentWindow != null && contentWindow.IsTreeOnlyMode ? contentWindow.View.ViewScale : 1.0f;
+        var arrowSize = Mathf.Clamp(12.0f * scale, 10.0f, 20.0f);
+        var iconSize = Mathf.Clamp(16.0f * scale, 12.0f, 28.0f);
+
+        // Use the current text layout, not just cached values.
+        var textRect = TextRect;
+        var iconLeft = textRect.Left - iconSize - 2.0f;
+        var x = Mathf.Max(iconLeft - arrowSize - 2.0f, 0.0f);
+        var y = Mathf.Max((HeaderHeight - arrowSize) * 0.5f, 0.0f);
+
+        CustomArrowRect = new Rectangle(x, y, arrowSize, arrowSize);
+    }
+    
+    /// <inheritdoc />
+    public override void PerformLayout(bool force = false)
+    {
+        base.PerformLayout(force);
+        UpdateCustomArrowRect();
+    }
+
+    /// <summary>
+    /// Shows the rename popup for the item.
+    /// </summary>
+    public void StartRenaming()
+    {
+        if (!_folder.CanRename)
+            return;
+
+        // Start renaming the folder
+        Editor.Instance.Windows.ContentWin.ScrollingOnTreeView(false);
+        var dialog = RenamePopup.Show(this, TextRect, _folder.ShortName, false);
+        dialog.Tag = _folder;
+        dialog.Renamed += popup =>
+        {
+            Editor.Instance.Windows.ContentWin.Rename((ContentFolder)popup.Tag, popup.Text);
+            Editor.Instance.Windows.ContentWin.ScrollingOnTreeView(true);
+        };
+        dialog.Closed += popup => { Editor.Instance.Windows.ContentWin.ScrollingOnTreeView(true); };
+    }
+
+    /// <summary>
+    /// Updates the query search filter.
+    /// </summary>
+    /// <param name="filterText">The filter text.</param>
+    public void UpdateFilter(string filterText)
+    {
+        bool noFilter = string.IsNullOrWhiteSpace(filterText);
+
+        // Update itself
+        bool isThisVisible;
+        if (noFilter)
+        {
+            // Clear filter
+            _highlights?.Clear();
+            isThisVisible = true;
+        }
+        else
+        {
+            var text = Text;
+            if (QueryFilterHelper.Match(filterText, text, out QueryFilterHelper.Range[] ranges))
+            {
+                // Update highlights
+                if (_highlights == null)
+                    _highlights = new List<Rectangle>(ranges.Length);
+                else
+                    _highlights.Clear();
+                var style = Style.Current;
+                var font = style.FontSmall;
+                var textRect = TextRect;
+                for (int i = 0; i < ranges.Length; i++)
+                {
+                    var start = font.GetCharPosition(text, ranges[i].StartIndex);
+                    var end = font.GetCharPosition(text, ranges[i].EndIndex);
+                    _highlights.Add(new Rectangle(start.X + textRect.X, textRect.Y, end.X - start.X, textRect.Height));
+                }
+                isThisVisible = true;
+            }
+            else
+            {
+                // Hide
+                _highlights?.Clear();
+                isThisVisible = false;
+            }
+        }
+
+        // Update children
+        bool isAnyChildVisible = false;
+        for (int i = 0; i < _children.Count; i++)
+        {
+            if (_children[i] is ContentFolderTreeNode child)
+            {
+                child.UpdateFilter(filterText);
+                isAnyChildVisible |= child.Visible;
+            }
+            else if (_children[i] is ContentItemTreeNode itemNode)
+            {
+                itemNode.UpdateFilter(filterText);
+                isAnyChildVisible |= itemNode.Visible;
+            }
+        }
+
+        if (!noFilter)
+        {
+            bool isExpanded = isAnyChildVisible;
+            if (isExpanded)
+                Expand(true);
+            else
+                Collapse(true);
+        }
+
+        Visible = isThisVisible | isAnyChildVisible;
+    }
+
+    /// <inheritdoc />
+    public override int Compare(Control other)
+    {
+        if (other is ContentItemTreeNode)
+            return -1;
+        if (other is ContentFolderTreeNode otherNode)
+            return string.Compare(Text, otherNode.Text, StringComparison.Ordinal);
+        return base.Compare(other);
+    }
+
+    /// <inheritdoc />
+    public override void Draw()
+    {
+        base.Draw();
+
+        // Draw all highlights
+        if (_highlights != null)
+        {
+            var style = Style.Current;
+            var color = style.ProgressNormal * 0.6f;
+            for (int i = 0; i < _highlights.Count; i++)
+                Render2D.FillRectangle(_highlights[i], color);
+        }
+
+        var contentWindow = Editor.Instance.Windows.ContentWin;
+        var scale = contentWindow != null && contentWindow.IsTreeOnlyMode ? contentWindow.View.ViewScale : 1.0f;
+        var icon = IsExpanded ? Editor.Instance.Icons.FolderOpen32 : Editor.Instance.Icons.FolderClosed32;
+        var iconSize = Mathf.Clamp(16.0f * scale, 12.0f, 28.0f);
+        var iconRect = new Rectangle(TextRect.Left - iconSize - 2.0f, (HeaderHeight - iconSize) * 0.5f, iconSize, iconSize);
+        Render2D.DrawSprite(icon, iconRect);
+    }
+
+    /// <inheritdoc />
+    public override void OnDestroy()
+    {
+        // Delete folder item
+        _folder.Dispose();
+
+        base.OnDestroy();
+    }
+
+    /// <inheritdoc />
+    protected override void OnExpandedChanged()
+    {
+        base.OnExpandedChanged();
+
+        Editor.Instance?.Windows?.ContentWin?.OnContentTreeNodeExpandedChanged(this, IsExpanded);
+    }
+
+    private DragDropEffect GetDragEffect(DragData data)
+    {
+        if (_dragActors != null && _dragActors.HasValidDrag)
+            return DragDropEffect.Move;
+        if (data is DragDataFiles)
+        {
+            if (_folder.CanHaveAssets)
+                return DragDropEffect.Copy;
+        }
+        else
+        {
+            if (_dragOverItems != null && _dragOverItems.HasValidDrag)
+                return DragDropEffect.Move;
+        }
+
+        return DragDropEffect.None;
+    }
+
+    private bool ValidateDragItem(ContentItem item)
+    {
+        // Reject itself and any parent
+        return item != _folder && !item.Find(_folder);
+    }
+
+    private bool ValidateDragActors(ActorNode actor)
+    {
+        return actor.CanCreatePrefab && _folder.CanHaveAssets;
+    }
+
+    private void ImportActors(DragActors actors)
+    {
+        Select();
+        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);
+        }
+        Editor.Instance.Windows.ContentWin.RefreshView();
+    }
+
+    /// <inheritdoc />
+    protected override DragDropEffect OnDragEnterHeader(DragData data)
+    {
+        if (data is DragDataFiles)
+            return _folder.CanHaveAssets ? DragDropEffect.Copy : DragDropEffect.None;
+
+        if (_dragActors == null)
+            _dragActors = new DragActors(ValidateDragActors);
+        if (_dragActors.OnDragEnter(data))
+            return DragDropEffect.Move;
+
+        if (_dragOverItems == null)
+            _dragOverItems = new DragItems(ValidateDragItem);
+
+        _dragOverItems.OnDragEnter(data);
+        return GetDragEffect(data);
+    }
+
+    /// <inheritdoc />
+    protected override DragDropEffect OnDragMoveHeader(DragData data)
+    {
+        if (data is DragDataFiles)
+            return _folder.CanHaveAssets ? DragDropEffect.Copy : DragDropEffect.None;
+        if (_dragActors != null && _dragActors.HasValidDrag)
+            return DragDropEffect.Move;
+        return GetDragEffect(data);
+    }
+
+    /// <inheritdoc />
+    protected override void OnDragLeaveHeader()
+    {
+        _dragOverItems?.OnDragLeave();
+        _dragActors?.OnDragLeave();
+        base.OnDragLeaveHeader();
+    }
+
+    /// <inheritdoc />
+    protected override DragDropEffect OnDragDropHeader(DragData data)
+    {
+        var result = DragDropEffect.None;
+
+        // Check if drop element or files
+        if (data is DragDataFiles files)
+        {
+            // Import files
+            Editor.Instance.ContentImporting.Import(files.Files, _folder);
+            result = DragDropEffect.Copy;
+
+            Expand();
+        }
+        else if (_dragActors != null && _dragActors.HasValidDrag)
+        {
+            ImportActors(_dragActors);
+            _dragActors.OnDragDrop();
+            result = DragDropEffect.Move;
+
+            Expand();
+        }
+        else if (_dragOverItems != null && _dragOverItems.HasValidDrag)
+        {
+            // Move items
+            Editor.Instance.ContentDatabase.Move(_dragOverItems.Objects, _folder);
+            result = DragDropEffect.Move;
+
+            Expand();
+        }
+
+        _dragOverItems?.OnDragDrop();
+
+        return result;
+    }
+
+    /// <inheritdoc />
+    protected override void DoDragDrop()
+    {
+        DoDragDrop(DragItems.GetDragData(_folder));
+    }
+
+    /// <inheritdoc />
+    protected override void OnLongPress()
+    {
+        Select();
+
+        StartRenaming();
+    }
+
+    /// <inheritdoc />
+    public override bool OnKeyDown(KeyboardKeys key)
+    {
+        if (IsFocused)
+        {
+            switch (key)
+            {
+            case KeyboardKeys.F2:
+                StartRenaming();
+                return true;
+            case KeyboardKeys.Delete:
+                if (Folder.Exists && CanDelete)
+                    Editor.Instance.Windows.ContentWin.Delete(Folder);
+                return true;
+            }
+            if (RootWindow.GetKey(KeyboardKeys.Control))
+            {
+                switch (key)
+                {
+                case KeyboardKeys.D:
+                    if (Folder.Exists && CanDuplicate)
+                        Editor.Instance.Windows.ContentWin.Duplicate(Folder);
+                    return true;
+                }
+            }
+        }
+
+        return base.OnKeyDown(key);
+    }
+}

Source/Editor/Content/Tree/ContentItemTreeNode.cs

@@ -0,0 +1,224 @@
+// Copyright (c) Wojciech Figat. All rights reserved.
+
+using System;
+using System.Collections.Generic;
+using FlaxEditor.Content.GUI;
+using FlaxEditor.GUI.Drag;
+using FlaxEditor.GUI.Tree;
+using FlaxEditor.Utilities;
+using FlaxEngine;
+using FlaxEngine.GUI;
+
+namespace FlaxEditor.Content;
+
+/// <summary>
+/// Tree node for non-folder content items.
+/// </summary>
+public sealed class ContentItemTreeNode : TreeNode, IContentItemOwner
+{
+    private List<Rectangle> _highlights;
+
+    /// <summary>
+    /// The content item.
+    /// </summary>
+    public ContentItem Item { get; }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ContentItemTreeNode"/> class.
+    /// </summary>
+    /// <param name="item">The content item.</param>
+    public ContentItemTreeNode(ContentItem item)
+    : base(false, Editor.Instance.Icons.Document128, Editor.Instance.Icons.Document128)
+    {
+        Item = item ?? throw new ArgumentNullException(nameof(item));
+        UpdateDisplayedName();
+        IconColor = Color.Transparent; // Reserve icon space but draw custom thumbnail.
+        Item.AddReference(this);
+    }
+
+    private static SpriteHandle GetIcon(ContentItem item)
+    {
+        if (item == null)
+            return SpriteHandle.Invalid;
+        var icon = item.Thumbnail;
+        if (!icon.IsValid)
+            icon = item.DefaultThumbnail;
+        if (!icon.IsValid)
+            icon = Editor.Instance.Icons.Document128;
+        return icon;
+    }
+
+    /// <summary>
+    /// Updates the query search filter.
+    /// </summary>
+    /// <param name="filterText">The filter text.</param>
+    public void UpdateFilter(string filterText)
+    {
+        bool noFilter = string.IsNullOrWhiteSpace(filterText);
+        bool isVisible;
+        if (noFilter)
+        {
+            _highlights?.Clear();
+            isVisible = true;
+        }
+        else
+        {
+            var text = Text;
+            if (QueryFilterHelper.Match(filterText, text, out QueryFilterHelper.Range[] ranges))
+            {
+                if (_highlights == null)
+                    _highlights = new List<Rectangle>(ranges.Length);
+                else
+                    _highlights.Clear();
+                var style = Style.Current;
+                var font = style.FontSmall;
+                var textRect = TextRect;
+                for (int i = 0; i < ranges.Length; i++)
+                {
+                    var start = font.GetCharPosition(text, ranges[i].StartIndex);
+                    var end = font.GetCharPosition(text, ranges[i].EndIndex);
+                    _highlights.Add(new Rectangle(start.X + textRect.X, textRect.Y, end.X - start.X, textRect.Height));
+                }
+                isVisible = true;
+            }
+            else
+            {
+                _highlights?.Clear();
+                isVisible = false;
+            }
+        }
+
+        Visible = isVisible;
+    }
+
+    /// <inheritdoc />
+    public override void Draw()
+    {
+        base.Draw();
+
+        var icon = GetIcon(Item);
+        if (icon.IsValid)
+        {
+            var contentWindow = Editor.Instance.Windows.ContentWin;
+            var scale = contentWindow != null && contentWindow.IsTreeOnlyMode ? contentWindow.View.ViewScale : 1.0f;
+            var iconSize = Mathf.Clamp(16.0f * scale, 12.0f, 28.0f);
+            var textRect = TextRect;
+            var iconRect = new Rectangle(textRect.Left - iconSize - 2.0f, (HeaderHeight - iconSize) * 0.5f, iconSize, iconSize);
+            Render2D.DrawSprite(icon, iconRect);
+        }
+
+        if (_highlights != null)
+        {
+            var style = Style.Current;
+            var color = style.ProgressNormal * 0.6f;
+            for (int i = 0; i < _highlights.Count; i++)
+                Render2D.FillRectangle(_highlights[i], color);
+        }
+    }
+
+    /// <inheritdoc />
+    protected override bool OnMouseDoubleClickHeader(ref Float2 location, MouseButton button)
+    {
+        if (button == MouseButton.Left)
+        {
+            Editor.Instance.Windows.ContentWin.Open(Item);
+            return true;
+        }
+
+        return base.OnMouseDoubleClickHeader(ref location, button);
+    }
+
+    /// <inheritdoc />
+    public override bool OnKeyDown(KeyboardKeys key)
+    {
+        if (IsFocused)
+        {
+            switch (key)
+            {
+            case KeyboardKeys.Return:
+                Editor.Instance.Windows.ContentWin.Open(Item);
+                return true;
+            case KeyboardKeys.F2:
+                Editor.Instance.Windows.ContentWin.Rename(Item);
+                return true;
+            case KeyboardKeys.Delete:
+                Editor.Instance.Windows.ContentWin.Delete(Item);
+                return true;
+            }
+        }
+
+        return base.OnKeyDown(key);
+    }
+
+    /// <inheritdoc />
+    protected override void DoDragDrop()
+    {
+        DoDragDrop(DragItems.GetDragData(Item));
+    }
+
+    /// <inheritdoc />
+    public override bool OnShowTooltip(out string text, out Float2 location, out Rectangle area)
+    {
+        Item.UpdateTooltipText();
+        TooltipText = Item.TooltipText;
+        return base.OnShowTooltip(out text, out location, out area);
+    }
+
+    /// <inheritdoc />
+    void IContentItemOwner.OnItemDeleted(ContentItem item)
+    {
+    }
+
+    /// <inheritdoc />
+    void IContentItemOwner.OnItemRenamed(ContentItem item)
+    {
+        UpdateDisplayedName();
+    }
+
+    /// <inheritdoc />
+    void IContentItemOwner.OnItemReimported(ContentItem item)
+    {
+    }
+
+    /// <inheritdoc />
+    void IContentItemOwner.OnItemDispose(ContentItem item)
+    {
+    }
+
+    /// <inheritdoc />
+    public override int Compare(Control other)
+    {
+        if (other is ContentFolderTreeNode)
+            return 1;
+        if (other is ContentItemTreeNode otherItem)
+            return ApplySortOrder(string.Compare(Text, otherItem.Text, StringComparison.InvariantCulture));
+        return base.Compare(other);
+    }
+
+    /// <inheritdoc />
+    public override void OnDestroy()
+    {
+        Item.RemoveReference(this);
+        base.OnDestroy();
+    }
+
+    /// <summary>
+    /// Updates the text of the node.
+    /// </summary>
+    public void UpdateDisplayedName()
+    {
+        var contentWindow = Editor.Instance?.Windows?.ContentWin;
+        var showExtensions = contentWindow?.View?.ShowFileExtensions ?? true;
+        Text = Item.ShowFileExtension || showExtensions ? Item.FileName : Item.ShortName;
+    }
+
+    private static SortType GetSortType()
+    {
+        return Editor.Instance?.Windows?.ContentWin?.CurrentSortType ?? SortType.AlphabeticOrder;
+    }
+
+    private static int ApplySortOrder(int result)
+    {
+        return GetSortType() == SortType.AlphabeticReverse ? -result : result;
+    }
+}

Source/Editor/Content/Tree/ContentTreeNode.cs

@@ -1,333 +0,0 @@
-// Copyright (c) Wojciech Figat. All rights reserved.
-
-using System.Collections.Generic;
-using FlaxEditor.GUI;
-using FlaxEditor.GUI.Drag;
-using FlaxEditor.GUI.Tree;
-using FlaxEditor.Utilities;
-using FlaxEngine;
-using FlaxEngine.GUI;
-
-namespace FlaxEditor.Content
-{
-    /// <summary>
-    /// Content folder tree node.
-    /// </summary>
-    /// <seealso cref="TreeNode" />
-    public class ContentTreeNode : TreeNode
-    {
-        private DragItems _dragOverItems;
-        private List<Rectangle> _highlights;
-
-        /// <summary>
-        /// The folder.
-        /// </summary>
-        protected ContentFolder _folder;
-
-        /// <summary>
-        /// Whether this node can be deleted.
-        /// </summary>
-        public virtual bool CanDelete => true;
-        
-        /// <summary>
-        /// Whether this node can be duplicated.
-        /// </summary>
-        public virtual bool CanDuplicate => true;
-
-        /// <summary>
-        /// Gets the content folder item.
-        /// </summary>
-        public ContentFolder Folder => _folder;
-
-        /// <summary>
-        /// Gets the type of the folder.
-        /// </summary>
-        public ContentFolderType FolderType => _folder.FolderType;
-
-        /// <summary>
-        /// Returns true if that folder can import/manage scripts.
-        /// </summary>
-        public bool CanHaveScripts => _folder.CanHaveScripts;
-
-        /// <summary>
-        /// Returns true if that folder can import/manage assets.
-        /// </summary>
-        /// <returns>True if can contain assets for project, otherwise false</returns>
-        public bool CanHaveAssets => _folder.CanHaveAssets;
-
-        /// <summary>
-        /// Gets the parent node.
-        /// </summary>
-        public ContentTreeNode ParentNode => Parent as ContentTreeNode;
-
-        /// <summary>
-        /// Gets the folder path.
-        /// </summary>
-        public string Path => _folder.Path;
-
-        /// <summary>
-        /// Gets the navigation button label.
-        /// </summary>
-        public virtual string NavButtonLabel => _folder.ShortName;
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="ContentTreeNode"/> class.
-        /// </summary>
-        /// <param name="parent">The parent node.</param>
-        /// <param name="path">The folder path.</param>
-        public ContentTreeNode(ContentTreeNode parent, string path)
-        : this(parent, parent?.FolderType ?? ContentFolderType.Other, path)
-        {
-        }
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="ContentTreeNode"/> class.
-        /// </summary>
-        /// <param name="parent">The parent node.</param>
-        /// <param name="type">The folder type.</param>
-        /// <param name="path">The folder path.</param>
-        protected ContentTreeNode(ContentTreeNode parent, ContentFolderType type, string path)
-        : base(false, Editor.Instance.Icons.FolderClosed32, Editor.Instance.Icons.FolderOpen32)
-        {
-            _folder = new ContentFolder(type, path, this);
-            Text = _folder.ShortName;
-            if (parent != null)
-            {
-                Folder.ParentFolder = parent.Folder;
-                Parent = parent;
-            }
-            IconColor = Style.Current.Foreground;
-        }
-
-        /// <summary>
-        /// Shows the rename popup for the item.
-        /// </summary>
-        public void StartRenaming()
-        {
-            if (!_folder.CanRename)
-                return;
-
-            // Start renaming the folder
-            Editor.Instance.Windows.ContentWin.ScrollingOnTreeView(false);
-            var dialog = RenamePopup.Show(this, TextRect, _folder.ShortName, false);
-            dialog.Tag = _folder;
-            dialog.Renamed += popup =>
-            {
-                Editor.Instance.Windows.ContentWin.Rename((ContentFolder)popup.Tag, popup.Text);
-                Editor.Instance.Windows.ContentWin.ScrollingOnTreeView(true);
-            };
-            dialog.Closed += popup => { Editor.Instance.Windows.ContentWin.ScrollingOnTreeView(true); };
-        }
-
-        /// <summary>
-        /// Updates the query search filter.
-        /// </summary>
-        /// <param name="filterText">The filter text.</param>
-        public void UpdateFilter(string filterText)
-        {
-            bool noFilter = string.IsNullOrWhiteSpace(filterText);
-
-            // Update itself
-            bool isThisVisible;
-            if (noFilter)
-            {
-                // Clear filter
-                _highlights?.Clear();
-                isThisVisible = true;
-            }
-            else
-            {
-                var text = Text;
-                if (QueryFilterHelper.Match(filterText, text, out QueryFilterHelper.Range[] ranges))
-                {
-                    // Update highlights
-                    if (_highlights == null)
-                        _highlights = new List<Rectangle>(ranges.Length);
-                    else
-                        _highlights.Clear();
-                    var style = Style.Current;
-                    var font = style.FontSmall;
-                    var textRect = TextRect;
-                    for (int i = 0; i < ranges.Length; i++)
-                    {
-                        var start = font.GetCharPosition(text, ranges[i].StartIndex);
-                        var end = font.GetCharPosition(text, ranges[i].EndIndex);
-                        _highlights.Add(new Rectangle(start.X + textRect.X, textRect.Y, end.X - start.X, textRect.Height));
-                    }
-                    isThisVisible = true;
-                }
-                else
-                {
-                    // Hide
-                    _highlights?.Clear();
-                    isThisVisible = false;
-                }
-            }
-
-            // Update children
-            bool isAnyChildVisible = false;
-            for (int i = 0; i < _children.Count; i++)
-            {
-                if (_children[i] is ContentTreeNode child)
-                {
-                    child.UpdateFilter(filterText);
-                    isAnyChildVisible |= child.Visible;
-                }
-            }
-
-            bool isExpanded = isAnyChildVisible;
-
-            if (isExpanded)
-            {
-                Expand(true);
-            }
-            else
-            {
-                Collapse(true);
-            }
-
-            Visible = isThisVisible | isAnyChildVisible;
-        }
-
-        /// <inheritdoc />
-        public override void Draw()
-        {
-            base.Draw();
-
-            // Draw all highlights
-            if (_highlights != null)
-            {
-                var style = Style.Current;
-                var color = style.ProgressNormal * 0.6f;
-                for (int i = 0; i < _highlights.Count; i++)
-                    Render2D.FillRectangle(_highlights[i], color);
-            }
-        }
-
-        /// <inheritdoc />
-        public override void OnDestroy()
-        {
-            // Delete folder item
-            _folder.Dispose();
-
-            base.OnDestroy();
-        }
-
-        private DragDropEffect GetDragEffect(DragData data)
-        {
-            if (data is DragDataFiles)
-            {
-                if (_folder.CanHaveAssets)
-                    return DragDropEffect.Copy;
-            }
-            else
-            {
-                if (_dragOverItems.HasValidDrag)
-                    return DragDropEffect.Move;
-            }
-
-            return DragDropEffect.None;
-        }
-
-        private bool ValidateDragItem(ContentItem item)
-        {
-            // Reject itself and any parent
-            return item != _folder && !item.Find(_folder);
-        }
-
-        /// <inheritdoc />
-        protected override DragDropEffect OnDragEnterHeader(DragData data)
-        {
-            if (_dragOverItems == null)
-                _dragOverItems = new DragItems(ValidateDragItem);
-
-            _dragOverItems.OnDragEnter(data);
-            return GetDragEffect(data);
-        }
-
-        /// <inheritdoc />
-        protected override DragDropEffect OnDragMoveHeader(DragData data)
-        {
-            return GetDragEffect(data);
-        }
-
-        /// <inheritdoc />
-        protected override void OnDragLeaveHeader()
-        {
-            _dragOverItems.OnDragLeave();
-            base.OnDragLeaveHeader();
-        }
-
-        /// <inheritdoc />
-        protected override DragDropEffect OnDragDropHeader(DragData data)
-        {
-            var result = DragDropEffect.None;
-
-            // Check if drop element or files
-            if (data is DragDataFiles files)
-            {
-                // Import files
-                Editor.Instance.ContentImporting.Import(files.Files, _folder);
-                result = DragDropEffect.Copy;
-
-                Expand();
-            }
-            else if (_dragOverItems.HasValidDrag)
-            {
-                // Move items
-                Editor.Instance.ContentDatabase.Move(_dragOverItems.Objects, _folder);
-                result = DragDropEffect.Move;
-
-                Expand();
-            }
-
-            _dragOverItems.OnDragDrop();
-
-            return result;
-        }
-
-        /// <inheritdoc />
-        protected override void DoDragDrop()
-        {
-            DoDragDrop(DragItems.GetDragData(_folder));
-        }
-
-        /// <inheritdoc />
-        protected override void OnLongPress()
-        {
-            Select();
-
-            StartRenaming();
-        }
-
-        /// <inheritdoc />
-        public override bool OnKeyDown(KeyboardKeys key)
-        {
-            if (IsFocused)
-            {
-                switch (key)
-                {
-                case KeyboardKeys.F2:
-                    StartRenaming();
-                    return true;
-                case KeyboardKeys.Delete:
-                    if (Folder.Exists && CanDelete)
-                        Editor.Instance.Windows.ContentWin.Delete(Folder);
-                    return true;
-                }
-                if (RootWindow.GetKey(KeyboardKeys.Control))
-                {
-                    switch (key)
-                    {
-                    case KeyboardKeys.D:
-                        if (Folder.Exists && CanDuplicate)
-                            Editor.Instance.Windows.ContentWin.Duplicate(Folder);
-                        return true;
-                    }
-                }
-            }
-
-            return base.OnKeyDown(key);
-        }
-    }
-}