He he, where would mankind be without experimentation ;-) A bump map is a way of simulating an uneven surface on a figure or prop by applying a picture. The picture holds the information about the surface structure in a grey scale image. Darker areas are rendered as depressions, whiter areas as raised parts of the surface. The bump maps are loaded in the Materials dialog box in Poser, the same where you load the texture. You can make a bump map using the same template as the texture map. Usually i tworks pretty well by just making a grey scale image of the texture in a paint program and inverting it. Poser Pro Pack can use the grey scale picture as is. Poser without Pro Pack needs a .bum file as the bump map. That is no problem, if you load e.g. a jpg picture as a bump map, Poser will convert it to a .bum for you. The only disadvantage with that is that a .bum file is usually VERY large. It's important to note that a bump map does not alter the geometry of the figure in any way, it only creates the illusion of surface roughness when the picture is rendered. Hopes that made it at least somewhat clearer :-)