Thanks for the tip Tasquah. But it works for people, not for objects (at least not always). (BTW : when I do this for people, I like to add some random noise : it gives a more realistic effect to the skin). But what I am looking for at the moment is simply a way to get my old Poser4 library of bump maps (especially some vehicles) in BUM format back in JPEG format. I can't understand why CL, who has invented the BUM format in the first place, and then discarded it for the JPEG format, did not give a way to translate BUM into JPEG. Not very customer-friendly, is it ? Compiler