I am would like to photograph people with a black back drop. I heard that it was best to use velvet (non crushed) backdrop. I have 4 lights and I use a Nikon D200. How hot do my lights need to be with a dark back drop? Do you recomend velvet? I am interested in any advice anyone can give me about photographing with black backdrops. Also I live in the Seattle where would be the best place to buy a black backdrop? Should I go to a fabric store?