Feature Request [URP] Lacking Render Pass Injection Points

Hey!

I double checked the code and the pass is already injected BeforeRenderingPostProcessing, have you tried injecting your pass at RenderPassEvent.BeforeRenderingPostProcessing + 1? In general injection points work like integers in a certain range for priority, so adding N after your RenderPassEvent should allow you to have your pass in between MotionVector and PostProcessing. Not sure if this helps?

Code (CSharp):

1.  internal MotionVectorRenderPass(Material cameraMaterial)
2.         {
3.             renderPassEvent = RenderPassEvent.BeforeRenderingPostProcessing;
4.             m_CameraMaterial = cameraMaterial;
5.             m_PassData = new PassData();
6.             base.profilingSampler = ProfilingSampler.Get(URPProfileId.MotionVectors);
7.  
8.             ConfigureInput(ScriptableRenderPassInput.Depth);
9.         }

we are also discussing changing some passes RenderPassEvents in the frame so will considering moving motion vectors earlier

 

I had a look and looks like the postprocessing passes are being queued in BeforeRenderingPostProcessing, so any render feature injected in the same place wouldn't work as expected. I am making a quick fix moving the postProcessing pass in the correct place so your code should work as expected by using BeforeRenderingPostProcessing + 1

 

(this will already work with the RenderGraph path once we enable it for everyone in 23 as we improved the injection point system for that, this specific fix should make it work as expected also on the old (current) one)

while waiting for the fix you can modify the package locally as a temporary workaround:

In PostProcessPasses.cs, replace the code at the end of the Recreate() function with this:

Code (CSharp):

1. if (data != null)
2.             {
3.                 m_ColorGradingLutPass = new ColorGradingLutPass(RenderPassEvent.BeforeRenderingPrePasses, data);
4.                 m_PostProcessPass = new PostProcessPass(RenderPassEvent.AfterRenderingPostProcessing - 2, data, ref ppParams);
5.                 m_FinalPostProcessPass = new PostProcessPass(RenderPassEvent.AfterRenderingPostProcessing - 1, data, ref ppParams);
6.                 m_CurrentPostProcessData = data;
7.             }