Every product and tool try to fence you in by offering proprietary shaders. It is not only Poser, there are C4D shaders, Vue procedure material, Genetica texture, Max shaders etc etc in all infinity. All they have in common is that they have an artificial look & feel - inferior to Hi-res photographic material, - not real. Photos is also more practical. If you build a model you want it to be able to be used in all tools and program and above all in the ubiquitous OBJ format.