I have a small sphere within a larger box.
How do I achieve a single-pass render whereby the small sphere is ALWAYS visible, i.e. the box is ‘matted’ out by the sphere irrespective of the view it is seen from?
You can invert the normals of the box and use the “Force back-face culling” from the global switches rollout to remove the back-side faces of the box.
Best regards,
Vlado
Mmm. Interesting theory. However, now my box renders quite dark, and the sphere inside is also dark…I still need the box to render absolutly normally with just a ‘hole’ cut out for the sphere to show through.
Ah, I see. Not sure how you can do that without rendering in separate passes though.
Best regards,
Vlado
Anyone got any suggestions - I’m sure you should be able to do this. Something to do with grabbing the matte of a particular object at render time and applying it to the opacity/visibility of another specific object.