diff --git a/Source/Editor/Tools/Terrain/PaintTerrainGizmo.cs b/Source/Editor/Tools/Terrain/PaintTerrainGizmo.cs
index c16bdd7e6..c9a521734 100644
--- a/Source/Editor/Tools/Terrain/PaintTerrainGizmo.cs
+++ b/Source/Editor/Tools/Terrain/PaintTerrainGizmo.cs
@@ -150,6 +150,12 @@ namespace FlaxEditor.Tools.Terrain
                 return;
             }
 
+            // Increase or decrease brush size with scroll
+            if (Input.GetKey(KeyboardKeys.Shift))
+            {
+                Mode.CurrentBrush.Size += dt * Mode.CurrentBrush.Size * Input.Mouse.ScrollDelta * 5f;
+            }
+
             // Check if no terrain is selected
             var terrain = SelectedTerrain;
             if (!terrain)
diff --git a/Source/Editor/Tools/Terrain/SculptTerrainGizmo.cs b/Source/Editor/Tools/Terrain/SculptTerrainGizmo.cs
index 96270a740..fef8bbf09 100644
--- a/Source/Editor/Tools/Terrain/SculptTerrainGizmo.cs
+++ b/Source/Editor/Tools/Terrain/SculptTerrainGizmo.cs
@@ -158,6 +158,12 @@ namespace FlaxEditor.Tools.Terrain
                 return;
             }
 
+            // Increase or decrease brush size with scroll
+            if (Input.GetKey(KeyboardKeys.Shift))
+            {
+                Mode.CurrentBrush.Size += dt * Mode.CurrentBrush.Size * Input.Mouse.ScrollDelta * 5f;
+            }
+
             // Check if selected terrain was changed during painting
             if (terrain != _paintTerrain && IsPainting)
             {