I recall seeing something about differences between bumpmaps and displacement maps -- it's worth trying a Poser 4 bumpmap as a Poser 5 displacement map, and vice versa. Seams in general -- some UV maps are better than others, but I've found that some do suffer from "projection" problems, Projection being used in something of the same sense as a mapmaker might, putting a 3d globe on a 2d map. Patterns get stretched enormously, and one pixel missing on the texturemap becomes a huge gap on the rendered figure.