if you load a jpg;bmp;tiff-file in poser on the bump-map directorie poser convert this file as a bump-map. you found it on the directory of your pic. you can only see waht the bump-map doing if you render your scene an give the bump-map a %-number more then 0. i work in first render with 100% and slow down the effect on my render, most near 50%-20%