Well, I don't have problems exporting and importing, but it is a hassle retexturing each figure every time I need to change the pose slightly. Although Bryce recognises the texture, it doesn't recognise transparencies or bump maps, and always imports with inappropriate values for ambience and specularity. It's partly a problem that when Poser exports a .obj, it only uses a subset of the .mtl file format. It would be very useful to get hold of the full .mtl file spec but it doesn't seem to be on the web. The only online documentation is for the limited subset that Poser uses.