diff --git a/sk_demo/src/Mat.cs b/sk_demo/src/Mat.cs
index b9d6d67..858393c 100644
--- a/sk_demo/src/Mat.cs
+++ b/sk_demo/src/Mat.cs
@@ -38,12 +38,15 @@ public class Mat {
   public Material sky   = new (Shader.FromFile("shaders/sky.hlsl"));
   
   public Material unlit = new (Shader.FromFile("shaders/unlit.hlsl"));
+  public Material unlit_clear = new (Shader.FromFile("shaders/unlit.hlsl"));
 
   public void Init() {
     data.oriels = new oriel_data[455]; // 455 *see dofdev.hlsli
 
     mono.FaceCull = Cull.None;
     sky.FaceCull = Cull.Front;
+
+    unlit_clear.Transparency = Transparency.Blend;
   }
 
   public void Run() {