View Full Version : Any way to use object to occlude geometry in render??

06 June 2010, 07:01 PM
Does anyone know if there is a way to use an object (poly cube for example) to occlude sections of a render? I'd like it to effect per pixel, not per object.

2 different method/results I'm thinking of where it occludes:

a) anything behind it (saving render time instead of rendering the whole thing and doing it in composite with a matte layer) I know there's the 'make a surface shader object in foreground' option, but am hoping there is something better...


b) anything inside the occluding object (for example a giant cube to make a cross section of rendered geometry) Key point being you can animate it. I think you can do that with booleans keeping the history? (correct me if I'm wrong) but that isn't appropriate for animating a cross-section of multiple objects in a scene.


CGTalk Moderation
06 June 2010, 07:01 PM
This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.