"if global lights don't cast any light, then what's the point of them being there?" They do cast light when they're applied. They only stop casting light when a different light set is applied. It's like Poser decided it would turn off the lights, but leave them all there physically. Like I said before, this only seem to happen to lights below a certain intensity... say 30% or below. All the ones that are set to 100% move or gets deleted when different light setting are applied. Maybe this is a new item to add to Poser 5 wish list.