The bump maps works as follows: If you make a gray scale image of the texture in e.g. Paint Shop Pro, you can use it as a bump map. The whiter areas means bumps and the darker means depression. This is a bit backwards, hence the need to "turn the texture negative" as in a previous answer. You will probably need to invert the grayscale image to get the desired effect. You can save it as a jpg or similar, but if you are not using Poser Pro Pack, you need to convert it to a .bum file in Poser. This is easy, just create a primitive, a cube will do. Apply the bump map jpg to the cube in the material editor. Poser will then prompt you to convert it to a .bum file. Click OK, and you're done. You have a .bum file to use as a bump map on any other object. If you have Pro Pack, you can use the jpg right away without conversion.