I’ve just tried to get a perfect dark room. It seems lightning (lightmap) for the room itself works well. However the character is still affected by light which is outside if he gets at a location where the two meshes where put together. Is this expected behaviour?
Inside (skylight switched off):
Inside (dynamic lights outside):
Screenshot taken inside of the wall:
Same scene skylight on (character even brighter … some minor lightbleed at one corner… could be fixed probably with 45° sharped meshes):
Same scene skylight on - dynamic lights outside (character even brighter - but red dynamic lights outside does not seem to light him):
I’ve got better results with intersecting meshes where the most outside faces did not reach into the room. However static lights even punched through on the character in that case.