diff --git a/sk_demo/src/Mat.cs b/sk_demo/src/Mat.cs
index 858393c..d08a2eb 100644
--- a/sk_demo/src/Mat.cs
+++ b/sk_demo/src/Mat.cs
@@ -47,6 +47,7 @@ public class Mat {
     sky.FaceCull = Cull.Front;
 
     unlit_clear.Transparency = Transparency.Blend;
+    unlit_clear.DepthWrite = false;
   }
 
   public void Run() {