Hello,
I really like the lighting WED does and would love to find any way to extract level geometry & lightmaps from WMB in any useful 3D format. Only thing I found is this:
https://forum.unity.com/threads/importing-wmb-files-from-3dgs.36300
...but it didn't really work.

I don't use Unity, I would only like to have model lightmapped in WED so I can open it in Blender/use it on SketchFab website.