add some shadergraph viz

Assets/CubeController.cs

@@ -8,7 +8,6 @@ public class CubeController : TripsitterAve {
 
     public float minSize = 2;
     public float maxSize = 4;
-    public Material cubeMat;
     public Material cubeMatLit;
 
     private Texture2D texture;
@@ -42,7 +41,7 @@ public class CubeController : TripsitterAve {
         texture.SetPixels(colourCache);
         texture.Apply();
 
-        cubeMat.SetTexture("_AudioTexture", texture);
+        cubeMatLit.SetTexture("_AudioTexture", texture);
     }
 
     // bool IsLeft(GameObject cube) {