This won't be the ideal answer but its a Poser amateur's version of one anyway ;) You can use the texture map as a bump map as is (this is probably just a pro pack thing). However, its usually (always?) better to make it a grey scale. Inverting it sometimes gives you what you want sometimes it doesn't. Usually you have to still tweak it. The bump map works by the lighter the shade the more "bump" there is. I try to think of mid grey as flat and then darker areas are recessed and lighter areas raised (I may be slightly flawed in this but it seems to work for what I want). Think about a typical texture. A 3D look is given by highlighting raised areas and shadowing recessed areas. If you invertthat then you'll get them the wrong way for your bump map. Or that's the way I see it and can't understand why some people say to invert the greyscale. Please, someone explain how that works if I'm wrong :)