You need to make a lightmap importance volume. Basically create your subtractive map, then make your red builder brush bigger than your map and create a lightmap importance volume, found under volumes. reason is because in a subtractive map you are carving out of space.
I can rotate and move mine just fine. I just get that message, but everything is fine otherwise. Does anybody still use subtractive levels? hehe. mine was subtractive in that green bleeding example. maybe thats why. ill try additive and post a result EDIT: BINGO! thanks jordan. I made another level that was additive this…
Thanks that was the case. It simply needed just a bit more distance. Is there a way to make the DomDirLight work in subtractive method? Or is it only working under "free" sky.