Overhaul depth preview rendering:

* Replace Jet color map with grayscale
* Added Shift + \ hotkey to toggle preview
* Added Shift + [, Shift + ] hotkeys to change contrast
* Added Shift + ;, Shift + ' hotkeys to change offset

OpenRA.Game/Graphics/SpriteRenderer.cs

@@ -226,9 +226,10 @@ namespace OpenRA.Graphics
 			shader.SetVec("DepthTextureScale", 128 * depthScale / height);
 		}
 
-		public void SetDepthPreviewEnabled(bool enabled)
+		public void SetDepthPreview(bool enabled, float contrast, float offset)
 		{
 			shader.SetBool("EnableDepthPreview", enabled);
+			shader.SetVec("DepthPreviewParams", contrast, offset);
 		}
 
 		public void SetAntialiasingPixelsPerTexel(float pxPerTx)

OpenRA.Game/Graphics/WorldRenderer.cs

@@ -45,8 +45,6 @@ namespace OpenRA.Graphics
 
 		readonly List<IRenderable> renderablesBuffer = new List<IRenderable>();
 
-		bool lastDepthPreviewEnabled;
-
 		internal WorldRenderer(ModData modData, World world)
 		{
 			World = world;
@@ -256,11 +254,7 @@ namespace OpenRA.Graphics
 			if (World.WorldActor.Disposed)
 				return;
 
-			if (debugVis.Value != null && lastDepthPreviewEnabled != debugVis.Value.DepthBuffer)
-			{
-				lastDepthPreviewEnabled = debugVis.Value.DepthBuffer;
-				Game.Renderer.WorldSpriteRenderer.SetDepthPreviewEnabled(lastDepthPreviewEnabled);
-			}
+			debugVis.Value?.UpdateDepthBuffer();
 
 			var bounds = Viewport.GetScissorBounds(World.Type != WorldType.Editor);
 			Game.Renderer.EnableScissor(bounds);

OpenRA.Game/Traits/World/DebugVisualizations.cs

@@ -20,7 +20,51 @@ namespace OpenRA.Traits
 		public bool CombatGeometry;
 		public bool RenderGeometry;
 		public bool ScreenMap;
-		public bool DepthBuffer;
 		public bool ActorTags;
+
+		// The depth buffer may have been left enabled by the previous world
+		// Initializing this as dirty forces us to reset the default rendering before the first render
+		bool depthBufferDirty = true;
+		bool depthBuffer;
+		public bool DepthBuffer
+		{
+			get => depthBuffer;
+			set
+			{
+				 depthBuffer = value;
+				 depthBufferDirty = true;
+			}
+		}
+
+		float depthBufferContrast = 1f;
+		public float DepthBufferContrast
+		{
+			get => depthBufferContrast;
+			set
+			{
+				depthBufferContrast = value;
+				depthBufferDirty = true;
+			}
+		}
+
+		float depthBufferOffset;
+		public float DepthBufferOffset
+		{
+			get => depthBufferOffset;
+			set
+			{
+				depthBufferOffset = value;
+				depthBufferDirty = true;
+			}
+		}
+
+		public void UpdateDepthBuffer()
+		{
+			if (depthBufferDirty)
+			{
+				Game.Renderer.WorldSpriteRenderer.SetDepthPreview(DepthBuffer, DepthBufferContrast, DepthBufferOffset);
+				depthBufferDirty = false;
+			}
+		}
 	}
 }