Command buffer for Post Camera Effects?

Unity Engine
1

Hi there,

Im used to do camera effects using OnRenderImage but i saw some code with commandBuffer,
i cant get the idea of it, im trying to do a simple downsample of my current camera render and it wont work at all… looking at the Frame Debugger i cant see the image effect being applied but in game and editor nothing change.

my code goes like:

OnPostRender

  • new Command Buffer
  • GetTemproraryRT of full screen
  • Create a GetTemporary half Size of screen
  • blit the Full Screen temporary to the Half Size screen temporary
  • Remove Full Screen temporary
  • Take the half Screen downsample RT and put it on another Full Screen Temporary
  • blit the downsample full screen into BuiltinRenderTextureType.CurrentActive
    ------->_buffer.Blit(FinalTextureID, BuiltinRenderTextureType.CurrentActive, _bloomMaterial);
  • AddCommandBuffer

That works only inside the frame debugger.
i tried removing the last blit and use SetGlobalTexture with no lucky.

What im missing here?
Help!

2

I’m not a professional, but maybe you create a new commandBuffer each time before the previous one works.
Look closer at the params in AddCommandBuffer.

3

im still trying and looks like if i want to use CommandBuffer as a Post Camera Effect i also need to use OnRenderImage or setup the camera differently. At the end is more expensive to use Command buffer for full screen camera effect.

I remove all of it and went to the only image effect technique with best optimization results.

im doing something wrong?