HDRenderloop: Add useForwardOnly option

Assets/ScriptableRenderLoop/HDRenderLoop/HDRenderLoop.asset.meta

 fileFormatVersion: 2
 guid: 2400b74f5ce370c4481e5dc417d03703
-timeCreated: 1476658764
+timeCreated: 1476718001
 licenseType: Pro
 NativeFormatImporter:
   userData: 

Assets/ScriptableRenderLoop/HDRenderLoop/HDRenderLoop.cs

             public bool displayOpaqueObjects = true;
             public bool displayTransparentObjects = true;
 
+            public bool useForwardRenderingOnly = false;
+
             public bool enableTonemap = true;
             public float exposure = 0;
         }
 
         void RenderGBuffer(CullResults cull, Camera camera, RenderLoop renderLoop)
         {
+            if (debugParameters.useForwardRenderingOnly)
+            {
+                return ;
+            }
+
             // setup GBuffer for rendering
             var cmd = new CommandBuffer();
             cmd.name = "GBuffer Pass";
 
         void RenderDeferredLighting(Camera camera, RenderLoop renderLoop)
         {
+            if (debugParameters.useForwardRenderingOnly)
+            {
+                return;
+            }
+
             // Bind material data
             m_litRenderLoop.Bind();
 
             cmd.SetRenderTarget(new RenderTargetIdentifier(s_CameraColorBuffer), new RenderTargetIdentifier(s_CameraDepthBuffer));
             renderLoop.ExecuteCommandBuffer(cmd);
             cmd.Dispose();
+
+            if (debugParameters.useForwardRenderingOnly)
+            {
+                RenderOpaqueRenderList(cullResults, camera, renderLoop, "Forward");
+            }
 
             RenderTransparentRenderList(cullResults, camera, renderLoop, "Forward");
         }

Assets/ScriptableRenderLoop/HDRenderLoop/HDRenderLoopInspector.cs

             public readonly GUIContent enableTonemap = new GUIContent("Enable Tonemap");
             public readonly GUIContent exposure = new GUIContent("Exposure");
 
+            public readonly GUIContent useForwardRenderingOnly = new GUIContent("Use Forward Rendering Only");
+
             public bool isDebugViewMaterialInit = false;
             public GUIContent[] debugViewMaterialStrings = null;
             public int[] debugViewMaterialValues = null;
                 EditorGUILayout.Space();
                 debugParameters.displayOpaqueObjects = EditorGUILayout.Toggle(styles.displayOpaqueObjects, debugParameters.displayOpaqueObjects);
                 debugParameters.displayTransparentObjects = EditorGUILayout.Toggle(styles.displayTransparentObjects, debugParameters.displayTransparentObjects);
+                debugParameters.useForwardRenderingOnly = EditorGUILayout.Toggle(styles.useForwardRenderingOnly, debugParameters.useForwardRenderingOnly);
 
                 if (EditorGUI.EndChangeCheck())
                 {

Assets/TestScenes/HDTest/HDRenderLoopTest.unity

   m_PrefabParentObject: {fileID: 0}
   m_PrefabInternal: {fileID: 0}
   m_GameObject: {fileID: 1828470159}
-  m_Enabled: 0
+  m_Enabled: 1
   m_EditorHideFlags: 0
   m_Script: {fileID: 11500000, guid: 92bb16b4ee20841929b24d6bd771738d, type: 3}
   m_Name: