Shadows are the obvious answer however i assume you are using lite and that s not an option.
Unity light passing through walls.
You have a point light source behind some walls.
It s really just a shadow type setting that needs to be set right.
How to fix indirect lights seeping through walls.
These options have obvious edge cases that can t be easily resolved.
Set the point light s baking property to mixed or baked then bake your lighting data using the lighting tab.
In that case you ll need to be a bit more clever.
This solution works in other engines like unity and ue4.
Although you have enclosed the light indirect light from the light source seems to seep through especially on the ceiling and the floor.
You can simulate this in shaders or use raycasts to see if the light is behind a wall.
By sydon thursday november 2 2017.
That s why shadows exist.
This is a quick fix for the light bleed that i was having a while ago.
Create a unity primitive cube plane etc sized similarly to your wall remove its collider and in the mesh.
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