Is it feasible to use GUI render pass to occluded scene.

[Brandon Backes]

Hi, I've been wondering if it would be a good idea to render the solid GUI elements before the geometry and write to z-buffer.  That way geometry, that is fully occluded by the GUI, does not need to be processed. Is this practical?

[Robert Osfield]

 Is the GUI rendered as part of the render, such as bt vsgImGui? If so writes to the z-buffer could be used to set the z buffer so early rejection of fragment processing can happen.

To cull whole geometries you'd need to do an occlusion query that would add an extra layer of complexity.

[Brandon Backes]

Excellent! That is what I was looking for. I'll start with implementing that. The Occlusion query might be fun later.