You could also use a PhysicalSurface base node instead of PoserSurface, plug the image map in to that. If the bump map is actually a bump map, plug it into the bump node and give it a reasonable value like 0.01-0.08, set the roughness somewhere around 0.5. Sometimes the maps are just fine but the node settings were the weird part, and PhysicalSurface does a better job especially if you are using Superfly.