Static light problem

hello, my static lights are doing these “square” like things in the walls, it’s not easily seen but if you see it once you can’t unsee it, is there any solution?
my world settings:
Static Lighting Level Scale - 0.1
Num Indirect Lighting Bounces - 5
Num Sky Lighting Bounces - 5
Indirect Lighting Quality - 2
Indirect Lighting Smoothness - 0.6

It’s most likely texture compression of the lightmaps. There’s very little you can do about this aside from disabling texture compression for lightmaps, which is generally a bad idea unless you’re doing archviz on small levels.

Have you tried to turn up the lightmass resolution for the objects?

sorry for replying so late, yes i tried