Strange shadows

Development Rendering
, , ,
1

I imported 3 objects that I created in Blender: house, door and window. I let UE generate the lightmap for all 3. When building lighting the shadows for house and door look OK but those of the window have a dark area that should not be there (circled in red below). I did increase the lightmap resolution of the window from 64 to 1024 but the rogue shadow is still there. I checked the lightmap and the islands are nicely separated.

I have the impression that I am missing something simple but what?

191800-capture.jpg
191800-capture.jpg755×613 35.8 KB

2

Perhaps your issue is not related to lightmap, but is caused by smoothing of your mesh? Trying ensuring that you have hard edges there.

3

[Me slapping my forehead] Yes of course! I had smoothing enabled on the side surfaces at 90 degrees angle.

Thanks a lot!