Black Ceiling

I have baked light in production quality and having totally dark ceiling? it seems like GI are not hitting ceiling at all?

The ceiling is a box brush with lightmap 2048.


Those lights in the left(ish) corner are movable/stationary?
Whenever I had black surfaces it was a normal or lightmap issue (if the material is not set to black! :wink: sry! ;))… missing second uv maybe…

Thanks I think because of the box brush in Unreal replaced it with normal Mesh and it is fine.