Let's try to get @SaltyKoala to do a write-up. He was giving us good info in the shout box yesterday. I should have copied that info. I think he was saying that turning light bake on will block light from going thru objects then lighting up objects beyond that have bake on. His technique for creating a dark map: Create a fully enclosed map with bake turned off for everything Use natural objects like terrain flats above it with bake on to shields your map from the skybox lighting Light inside with artificial lights There still might be situations that let other light creep in Keep saying @ SaltyKoala (like Bloody Mary) until he appears.