wgreenlee1, Poser 4.03 transforms JPEG into BUM, OK. But what I want to do is the opposite : transform the BUM into JPEG to use in Poser 5. (for files for which I don't have the original JPEG, of course) I did not found in the Poser 5 book a line about this conversion. It just tells you to check the "ignore shader trees" option, which I don't want to do because I wish to use procedural textures on the same render. If anyone knows how to do this, I'd be most grateful to know.