It's just for stamping out hollow spheres. The punching is done elswhere. Changing the lights from square spots to radial lights seems to have fixed everything. I had cast and recieve shadows off, and the angle from the lights to the 2D backdrop was high enough that the shadow should have passed above the backdrop. It still somehow made a difference. I used square spotlights in my christmas scene. The light didn't pick up the stained glass colors even though it was loaded into the volume channel. It also didn't pick up the shape of the window when I had cast shadows selected for the walls. I wound up applying as a gel and putting up pine trees so you could not see the tops of the windows were square instead of curved. Special bryce lights have special quirks. Someday I'll figure them out.