I’ve been using the production settings but they don’t seem to make a difference. I tried removing the reflection sphere and still got the error. Changing the material also doesn’t make a difference.
The problem is most apparent when the lighting is purely indirect lighting. When the light is facing the surface it’s much less noticeable. It seems like each mesh is getting an averaged color for the indirect lighting or something like that. Where there should be a gradient each mesh is colored distinctly it’s own color.
It’s pretty easy to set up to test, if it’s happening to anyone else. I’m just duplicating (alt+moving) a Shape_Plane (in the Shapes folder from the default content of a blank project) to make a wall. I turned them away from the light source so that they’re only getting indirect lighting when I build.