Lightmass artifacts on walls


I’m having some issues with my lightmass on my wall in an interior scene. It looks like it has some kind of compression on it and I really don’t know how to fix it :confused: .

My settings on the screen are set with a “Medium quality” render but I also have this issue in production quality and the lightmap resolution is set on 512 (I also tried with 1024 and 2048 and the artifacts were still there).

The artifacts only appear on this wall. The others are fine.

Any ideas?

Thanks :slight_smile: