Question How to use Blitter to blit a RenderTexture (from Shader.PropertyToID) to another RenderTexture?

As the URP document says: avoid using CommandBuffer.Blit() to perform blit operation. And it also recommend using SRP Blitter API instead. However, it reported errors when I changed to Blitter.

I have a _MyTempRTId that is allocated from CommandBuffer.GetTemporaryRT, and a public RenderTexture, targetRT. I want to blit _MyTempRTId to targetRT. So first I converse them to type RTHandle so I can pass them to Blitter API.

Then it reported errors as I call the Blitter.BlitCameraTexture. The following is pseudocode that explains the sample.

Code (CSharp):

1. private static int _MyTempRTId = Shader.PropertyToID("_MyTempRT");
2.  
3. public RenderTexture targetRT;
4.  
5. public void Blit(CommandBuffer cmd)
6. {
7.     var myTempRTIdentifier = new RenderTargetIdentifier(_MyTempRTId);
8.     var myTempRTHandle = RTHandles.Alloc(myTempRTIdentifier);
9.  
10.     var targetRTHandle = RTHandles.Alloc(targetRT);
11.  
12.     Blitter.BlitCameraTexture(cmd, myTempRTHandle, targetRTHandle, default, true);
13. }

 

Did you manage to do it?

 

What is the error you get?