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Question by JeffRBake · Jun 24, 2013 at 09:38 PM · shaderrendertextureprofilerslowgpu

RenderTexture.GrabPixels slowdown - How to fix?

I have a shader that is being applied to objects in a certain layer. Everything works fine until I add a lot. I tracked down the slowdown and found that it was the RenderTexture.GrabPixels in the Shader.SetPass. Here is what the profiler looks like. alt text

alt text

This is what the RenderTexture.GrabPixels shows when I click on it in the profiler. Are each of these objects being handled separately? If so, is there a way to group them? (Again, only objects in a specific layer are being handled here)

Now obviously when I am in a location that the camera does not have sight of these objects, the GPU usage goes down.

gpu_usage.png (27.2 kB)
culprit.png (18.2 kB)
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