Hey guys, thanks in advance for any insight you may be able to provide. Here is my conundrum:
I have to render a multitude of scenes in Cycles in which the material of one object in the scene will change. However I want to save time by not having to render the entire scene over again every time I have to change materials.
Here is a simplified example of what I have to do:
So the main cube (white) needs to be completely static in every iteration of the render, but the “band” (green) around it has to change materials with each new render of the scene to blue, red, gold, or any other material.
Ideally I’d like to be able to only have to re-render the “band” with a new material each time and somehow replace the band in the picture above so it looks as if the Cube and the Band were rendered together on the same layer. I’ve tried to do this in the compositor with mix nodes (set on scene) combining an image of the main cube and the render result of the Band on its own layer, but I can’t seem to make it work. I keep running into transparency issues for some reason.
Thanks again for any insight you might have in regards to achieving the desired effect.