There are strange square shadows on the wall how can i fix that

There are these quare shadows on the wall wich i made out of 4 planes (they all seem to have a diffrent light level)
what can i do step by step to solve that issue

Hi!

This problem occurs when you build a modular wall. You need decrease Static Light Level Scale parameter in Lightmass in World Setting.

Static Light Level Scale = 1.0

Static Light Level Scale = 0.1

thank you very much

i did what you said but it turned out like this:

Try to use this settings:

Light Build Quality: Production

World Settings:

Static Lighting Level Scale: 0.1

Indirect Lighting Quality: 2

Indirect Lighting Smoothness: 0.6