My wife is a mixed media artist, working with acrylics and photographs on a variety of surfaces, mostly 2 dimensional. I have been photographing her artwork and now some of her friends with mixed results I am using two 500w incadescant lights, reflective umbrellas and shooting with a D-80 with a 28-80mm nikkor af lens. I have set the white balance to incadescant and am getting mixed results. I really want to do the art justice any ideas??