Grammer oh no, the very person I dont want to hear from considering my condition at the time that I posted this message! But seriously, thanks for your suggestions Karl (aka Grammer). I understand you with regard to the light and dark tones in the bump map (question 1). However, I dont follow you with regard to the resolution (question 2). My bump map was actually made from the grayscale bump map that DAZ provides as a .jpg. In the PC version of Poser 4.03, the program converts this into the map that is actually used. I (or at least Photoshop) suspect that the map is actually a .bmp file, although Poser labels it .bum. This takes the map from a few hundred kilobyte .jpg file to a whopping 12 MB .bum file! And, what is the deal with the MAT files? Thanks Leather-Guy for the research and Grammer for putting up with mine! Take care.