Is there a tool or blender plugin that can do "paint by boolean intersection"?

wx3labs

Imagine I have a 3D object with a single solid black texture. I want to take another 3D object, position it so it overlaps the first, and turn any part of the texture in the overlapping area white. The end goal is to create a mask that I can export for use in shaders and Substance Painter.

Does this capability exist?

oglu

You could do that with Bifrost and vertexcolors.
https://forums.autodesk.com/t5/bifrost-forum/create-weightmap-based-on-proximity/m-p/9086827#M1053

V!nc3r

You're maybe looking for Dynamic Paint.

I never played with it so I made an ugly scene to play, I attached the zip if it can helps.

Basically you have to set your main object as "canvas", and your brush object (what's you called "boolean") as brush.

If you don't want animation you can bake from frame 1 to 1.

wx3labs

Thanks! I'll take a look at dynamic paint.