Culling material

Not putting this in the surface mega thread because theoretically there’s a little more function to it.

A material that culls any other surface inside its bounds.

Unlike in the image the inner walls of the hole likely wouldn’t have a material of their own and would simply be invisible.
And as demonstrated by the above images it isn’t a necessary addition, just one that might save on the amount of objects it take to achieve certain effects.

I would LOVE this for windows and doorways. It’s such a pain to build custom structures because there’s no way to cut out holes and whatnot.