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Question by temptest123 · Jan 13, 2013 at 03:05 PM · renderingshaderlab

shaderlab GrabPass - grab only part of the framebuffer

GrabPass can be expensive, especially if it's performed for each object individually ( GrabPass {}). If I need only a small section of the current framebuffer (only the part behind the screen-space-boundingbox of each object) it should be much faster if it'd be possible to grab only the part of the texture that is of interest.

Is there some way to do this?

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