turn off MSAA to fix opaque shaders not working

Assets/LWRPSupport/LWRPBackgroundRenderPass.cs

 
             SetRenderTarget(cmd, m_TargetIdentifier, colorLoadOp, colorStoreOp,
                 m_DepthIdentifier, depthLoadOp, depthStoreOp, ClearFlag.All, Color.clear, m_Descriptor.dimension);
-
+            
             cmd.Blit(null, m_TargetIdentifier, m_BlitMaterial);
             context.ExecuteCommandBuffer(cmd);
             CommandBufferPool.Release(cmd);

Assets/Materials/LWRPCube.mat

   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_Name: LWRPCube
-  m_Shader: {fileID: 4800000, guid: 650dd9526735d5b46b79224bc6e94025, type: 3}
+  m_Shader: {fileID: 4800000, guid: 933532a4fcc9baf4fa0491de14d08ed7, type: 3}
   m_ShaderKeywords: 
   m_LightmapFlags: 4
   m_EnableInstancingVariants: 0

Assets/Materials/LWRPPlane.mat

   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_Name: LWRPPlane
-  m_Shader: {fileID: 4800000, guid: 650dd9526735d5b46b79224bc6e94025, type: 3}
+  m_Shader: {fileID: 4800000, guid: 933532a4fcc9baf4fa0491de14d08ed7, type: 3}
   m_ShaderKeywords: 
   m_LightmapFlags: 4
   m_EnableInstancingVariants: 0

Assets/Scenes/SampleLWRPScene.unity

   - component: {fileID: 282840811}
   - component: {fileID: 282840815}
   - component: {fileID: 282840812}
+  - component: {fileID: 282840816}
   m_Layer: 0
   m_Name: AR Camera
   m_TagString: MainCamera
   m_Enabled: 1
   serializedVersion: 2
   m_ClearFlags: 3
-  m_BackGroundColor: {r: 0.17021184, g: 0.8018868, b: 0.7888453, a: 1}
+  m_BackGroundColor: {r: 0.16862746, g: 0.17177747, b: 0.8, a: 1}
   m_projectionMatrixMode: 1
   m_SensorSize: {x: 36, y: 24}
   m_LensShift: {x: 0, y: 0}
   m_TargetDisplay: 0
   m_TargetEye: 3
   m_HDR: 0
-  m_AllowMSAA: 1
+  m_AllowMSAA: 0
   m_AllowDynamicResolution: 0
   m_ForceIntoRT: 0
   m_OcclusionCulling: 1
   m_TrackingType: 0
   m_UpdateType: 0
   m_UseRelativeTransform: 1
+--- !u!114 &282840816
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 282840810}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: ba6af5eaa8d821f4e93093fd37ee3484, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_RenderShadows: 1
+  m_RequiresDepthTextureOption: 2
+  m_RequiresOpaqueTextureOption: 2
+  m_RequiresDepthTexture: 0
+  m_RequiresColorTexture: 0
+  m_Version: 2
 --- !u!1 &427002218
 GameObject:
   m_ObjectHideFlags: 0
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 518872366}
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
-  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalPosition: {x: 0, y: 0, z: 2.65}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_Children: []
   m_Father: {fileID: 0}