I have tried everything. I cleaned the object itself of unecessary vertices. I re-mapped the entire UV. Increased texture size, but still, when I lightmap this scene it ALWAYS puts weird black spots onto this object, specially on the stairs. Here is the GameObject: The UV Lightmap The Lightmapping settings: No Overlaps: also, in the Unity's Overlap warning message on the Console, it only says that there are 4 overlaps but NONE are about this GameObject that I am showing to you. The actual lightmap: Model import settings: Generate Lightmap UV'S: Checked How can i fix this?