I’m convinced a couple changes I made in my lightmass settings in the world settings caused this strange artifact on the floor of my scene. I have a directional light coming in from the son, being occluded by multiple beams, but then showing a sort of spiral shadow on the floor. Why is this?
Here are my lightmass settings:
Here’s the strange shadow:
And here’s the lightmap density, which clearly shows it’s not the problem: