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