That s why shadows exist.
Light goes through walls unity.
Is there a way to stop the light going through walls.
This also lowers the performance cost of lighting.
These options have obvious edge cases that can t be easily resolved.
Place it just behind your wall so that it blocks the light from leaking out.
Create a unity primitive cube plane etc sized similarly to your wall remove its collider and in the mesh renderer properties set it to shadows only.
Open window lighting scene and turn the ambient intensity to 0 and reflection intensity to 0 to get rid of the default ambient lighting.
In that case you ll need to be a bit more clever.
Since you re using unity free put the plane on a specific layer.
Unity can set it and forget it rather than continuously having to readjust the lighting effects.
Now the light will not affect the object.
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Light going through wall.
You have a point light source behind some walls.
Although you have enclosed the light indirect light from the light source seems to seep through especially on the ceiling and the floor.
The layers are the dropdown box in the upper right of the inspector.
These are lit up by the directional light which comes with new scenes automatically.
Shadows are the obvious answer however i assume you are using lite and that s not an option.
I am in a room where there is no light and i can see the light coming from the next.
You can simulate this in shaders or use raycasts to see if the light is behind a wall.