@script ExecuteInEditMode
  @script RequireComponent(Camera)
  
  var shader : Shader;
  
  private var shaderCamera : GameObject;
  
  function OnPostRender()
  {
          if (!enabled || !gameObject.active || !shader)
                  return;
  
          if (!shaderCamera) {
                  shaderCamera = new GameObject("ShaderCamera", Camera);
                  shaderCamera.camera.enabled = false;
                  shaderCamera.hideFlags = HideFlags.HideAndDontSave;
          }
          
          var cam = shaderCamera.camera;
          cam.CopyFrom (camera);
          cam.backgroundColor = Color(0,0,0,0);
          cam.clearFlags = CameraClearFlags.SolidColor;
          cam.RenderWithShader (shader, "RenderType");
  }
  
  function OnDisable() {
          DestroyImmediate(shaderCamera);
  }
  
  function OnGUI() {
          GUILayout.BeginArea (Rect(5,5,300,125), null, GUI.skin.button);
          GUILayout.Label ("Renders everything with different colors based on shader's RenderType");
          GUILayout.Label ("Not that useful by itself; just shows how to replace shaders with different RenderTypes");
          GUILayout.Label ("Most of complexity in replacement shaders is to support terrain. If you don't need terrain, the replacement shaders can be much simpler.");
          GUILayout.EndArea ();
  }