Directional Light going through my blender asset's walls in weird ways.

I am working on a prototype, and I have to rush so the model I'm working with is not "optimal" in many ways. Either way, I've tried many things but whatever I do, light still passes through walls and it changes depending on how I orient the camera (even though the asset is not moving at all). The only thing that seemed to have fixed the issue was turning the "Near Plane" setting of the Directional Light all the way up to 10 (max value). I was wondering whether this solution might cause other issues or if you know of any other ways I might be able to fix this. Thanks!

 

Are these planes? If they're, change to cube to add some thickness.
Planes don't have any thickness, should never be used for walls/roof in a game engine to prevent light leaking

 

Oh, I didn't know that... Thanks!
They are planes xD

 

As an addition to the solution, the issue may not have been the mesh, but rather the fact I had set my shadow distance too high in the URP settings... Lowering it and tweaking the light's "near plane" value is what ended up fixing my issue.

 

I found the setting on the directional light I was using in URP 2022 LTS, under Shadows, Near Plane slider.