Doesn't PPP use JPEG for bump textures? You have the bump.jpg - right? The simple fix is to open the P4 MAT, which is what you are using here, is a text editor. FIND = .bum REPLACE WITH = .jpg For this sort of product, there are usually duplicate MAT poses, one for P4 and one for PPP. The difference is essentially these bump formats. The preconversion of bump.jpg to bump.BUM described above is if you have P4, the bump is supplied as a .jpg and the MAT wants a *.BUM. Doing by hand, Poser 4 will convert after asking. From a MAT, it does not.