Light passes through objects and glares at the corners of the normal map

Maybe my question is in the wrong category. But I’ll leave it here anyway.
And so, the point is simple. I decided to try to make demo locations from RE7 “Guest House”
I made all the cassettes myself in a blender, and here’s the problem with How to explain it…
The light from “DirectionalLight3D” and in general from any light source powerful enough passes inside the “Room” and very strongly glares at the corners and normals of my walls.

Can you upload a minimal reproduction project somewhere? It’s hard to know exactly what could be causing it. It could be due to normals pointing towards incorrect directions (either in your mesh or texture) but that’s just a guess.

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