Hello. Maybe someone knows how to fix the fact that the light spreads in the form of “lines”, attached a screenshot.
This kind of artifact is usually referred to as “banding”. It can happen for many reasons, but assuming you are using baked lighting, it’s usually down to the choice of texture format for the lightmap.
There are 2 settings you try fiddling with: First, set your lightmap encoding (Project Settings > Player > Other Settings > Lightmap Encoding) to “High Quality”. Next, set your lightmap compression (Window > Rendering > Lighting > Lightmap Compression) setting to “None” or “High Quality”.
Lmk if either helps