You can change the lights on almost all light entities. Regarding map split: I guess a good solution would be to provide to versions of the map, a splitted and an unsplitted. So both parties, the low endlers and the high endlers, would benefit. Obviously this would mean some extra work for you. Regarding vert drift: I've already mentioned as we were talking about the func_static issue, that the method used is very error sensitive. If someone could post the current way this is be done, I would gladly like to come up with alternatives if possible. A question about that, has the matrix-matrix product that was there been removed? (Maybe the wrong thread to post this, but ... )