Hmm right I only colored one side. I should test that out using the test room I made. The bad thing is even with my walls 1/8” thick would it cast a shadow on the floor even though being set to transparent?

Oh well, at least I used some SVG and learned something new because I was so curious how the 3-sided door frames did their magic with no threshold bottom side. Custom partial arcs at the top are tricky to figure out.