4.12 Lightmass : no GI on Actor hidden in game

With 4.12 all objects that have the flag “Actor Hidden In Game” don’t cast bounces light (so with the reflector/spot technique you need to uncheck this flag for baking and check it after).

Thanks for pointing that out! I just got my hands on 4.12 and was wondering why everything went dark all of a sudden after building light.