Hi Justin, I noticed a pair of errors in the lighting.
In the tiles, when you turn the camera to the south, it comes out as a kind of very translucent black shadow layer.
And on the walls, there are pieces of illumination that don't really correspond, and vary step by step.
Do you think you can fix it?
Gameplay link: https://drive.google.com/file/d/0B3TaZxrUSHfeLW1GdHlDWFNuWXM/view