Right now you have to script this manually. We want to add such functionality (essentially “hijack shaders this way!”) in the future because we know it would be really useful for some effects.
I’ve used Projectors for this - On a conceptual level, a Projector basically renders all geometry seen by a Camera and the projector’s FOV with a specific material. If you just make your projector large enough, that can be a nice way to get it done.