diff --git a/OpenRA.FileFormats/Graphics/IGraphicsDevice.cs b/OpenRA.FileFormats/Graphics/IGraphicsDevice.cs
index ae7c76df0c..ec82cff24e 100755
--- a/OpenRA.FileFormats/Graphics/IGraphicsDevice.cs
+++ b/OpenRA.FileFormats/Graphics/IGraphicsDevice.cs
@@ -53,6 +53,9 @@ namespace OpenRA.FileFormats.Graphics
 
 		void EnableDepthBuffer();
 		void DisableDepthBuffer();
+
+		void EnableStencilBuffer();
+		void DisableStencilBuffer();
 	}
 
 	public interface IVertexBuffer<T>
diff --git a/OpenRA.Game/Graphics/Renderer.cs b/OpenRA.Game/Graphics/Renderer.cs
index e129851745..3be7b230f7 100644
--- a/OpenRA.Game/Graphics/Renderer.cs
+++ b/OpenRA.Game/Graphics/Renderer.cs
@@ -198,5 +198,17 @@ namespace OpenRA.Graphics
 			Flush();
 			Device.DisableDepthBuffer();
 		}
+
+		public void EnableStencilBuffer()
+		{
+			Flush();
+			Device.EnableStencilBuffer();
+		}
+
+		public void DisableStencilBuffer()
+		{
+			Flush();
+			Device.DisableStencilBuffer();
+		}
 	}
 }
diff --git a/OpenRA.Renderer.Null/NullGraphicsDevice.cs b/OpenRA.Renderer.Null/NullGraphicsDevice.cs
index 61c7878caf..cc8dd57233 100644
--- a/OpenRA.Renderer.Null/NullGraphicsDevice.cs
+++ b/OpenRA.Renderer.Null/NullGraphicsDevice.cs
@@ -41,6 +41,9 @@ namespace OpenRA.Renderer.Null
 		public void EnableDepthBuffer() { }
 		public void DisableDepthBuffer() { }
 
+		public void EnableStencilBuffer() { }
+		public void DisableStencilBuffer() { }
+
 		public void Clear() { }
 		public void Present() { }
 
diff --git a/OpenRA.Renderer.SdlCommon/SdlGraphics.cs b/OpenRA.Renderer.SdlCommon/SdlGraphics.cs
index ccd7ca08aa..0cf17f2d3e 100644
--- a/OpenRA.Renderer.SdlCommon/SdlGraphics.cs
+++ b/OpenRA.Renderer.SdlCommon/SdlGraphics.cs
@@ -49,6 +49,7 @@ namespace OpenRA.Renderer.SdlCommon
 			Sdl.SDL_GL_SetAttribute( Sdl.SDL_GL_GREEN_SIZE, 8 );
 			Sdl.SDL_GL_SetAttribute( Sdl.SDL_GL_BLUE_SIZE, 8 );
 			Sdl.SDL_GL_SetAttribute( Sdl.SDL_GL_ALPHA_SIZE, 0 );
+			Sdl.SDL_GL_SetAttribute( Sdl.SDL_GL_STENCIL_SIZE, 1 );
 
 			int windowFlags = 0;
 			switch (window)
@@ -133,6 +134,24 @@ namespace OpenRA.Renderer.SdlCommon
 			ErrorHandler.CheckGlError();
 		}
 
+		public void EnableStencilBuffer()
+		{
+			Gl.glClear(Gl.GL_STENCIL_BUFFER_BIT);
+			ErrorHandler.CheckGlError();
+			Gl.glEnable(Gl.GL_STENCIL_TEST);
+			ErrorHandler.CheckGlError();
+			Gl.glStencilFunc(Gl.GL_NOTEQUAL, 1, 1);
+			ErrorHandler.CheckGlError();
+			Gl.glStencilOp(Gl.GL_KEEP, Gl.GL_KEEP, Gl.GL_INCR);
+			ErrorHandler.CheckGlError();
+		}
+
+		public void DisableStencilBuffer()
+		{
+			Gl.glDisable(Gl.GL_STENCIL_TEST);
+			ErrorHandler.CheckGlError();
+		}
+
 		public void EnableDepthBuffer()
 		{
 			Gl.glClear(Gl.GL_DEPTH_BUFFER_BIT);