Use Compute Shader to do post-processing in OnRenderImage function ?

Unity Engine
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1

I would like to do post processing with Compute Shader is that possible ?

2

Sure it is.

  • Create RWTexture (RenderTexture with enableRandomWrite) as your destination buffer. You can’t use OnRenderImage dest texture because it doesn’t have random write enabled.
  • Set OnRenderImage source texture and dest texture from step 1 to your compute shader (ComputeShader.SetTexture)
  • Start your compute shader (ComputeShader.Dispatch)
  • Copy RWTexture from step 1 into OnRenderImage dest texture (Graphics.Blit)
2 Likes
3

Wonderful Thank you for the tip!