GI + closed room problem

Hi, I’m making a building, lighted by one unique directional light(sun), using dynamic GI. The problem is some rooms has no windows, but GI light them …how can i solve it?

Tweak the resolution of the light propagation. Also make sure the room has super thick walls that have an outside face as well.

I would not recommend using light propagation for indoor. It is not made for it since spot and point lights are currently not supported. There is a lot of leaking with real time lighting, this is not noticed when you have outdoor nature environments, indoor it just looks bad.

Good luck!