Uneven shadows on interior walls

[Riley1389]

@darthviper107;672973

your lightmap resolution is too low
But the other issue is that you need to make sure that walls/floors/ceilings don’t extend beyond each other, the surface outside of those edges will receive shadow or light which will bleed onto the inside.

One more possibility could be that the Lightmap UVs aren’t setup correctly. For walls and the like, you should be splitting UV islands at places on the meshes that are close or equal to ~85/90 degrees (Depending on who you ask.)