Re-fixed, Visual mode: in some cases some D3D textures were not disposed after closing a map, eventually resulting in E_OUTOFMEMORY crash.

Fixed, Preferences window: some folding settings were not applied in the Script Editor preview control.
Changed, Visual mode: increased z-buffer depth to 24 bits. Z-fighting among far away but close to each other surfaces should be less noticeable now.

Source/Core/Data/ImageData.cs

@@ -462,6 +462,10 @@ namespace CodeImp.DoomBuilder.Data
 						if((width != texture.GetLevelDescription(0).Width) || (height != texture.GetLevelDescription(0).Height))
 							throw new Exception("Could not create a texture with the same size as the image.");
 					}
+
+#if DEBUG
+					texture.Tag = name; //mxd. Helps with tracking undisposed resources...
+#endif
 				}
 			}
 		}