Camera sees light in the dark

Hello!

I have tried to create scene, where the player is in a pitch black room. But, the camera is somehow sees light in the end of the room. When I go there, then it becomes black, but then it sees light from the other side of the room. The “bright” part is well within the camera’s field of vision.
It seems like, that the camera or the lightning ingores the ceiling from far.

It a new project, the only thing I have changed in the lightning settings, is switching off ambient lighning.

How can I make the room full black?

It might be passed the realtime shadow distance. If so the solution would be to use a mixed light Unity - Manual: Light Mode: Mixed and set the bake mode Distance Shadowmask Unity - Manual: Lighting Mode: Shadowmask. This way the shadow will be baked to a texture and used in the far distance.

fog