I only have that sometimes when I use objects without thickness.
You could also try to make the material on the walls 2sided.
Oh and another one: Do you use “Preview” or “Production” in your light built settings?
I only have that sometimes when I use objects without thickness.
You could also try to make the material on the walls 2sided.
Oh and another one: Do you use “Preview” or “Production” in your light built settings?