Why don't you just load the OBJ file into Bryce? It should load without any problems. Also, there's no need to create a new UV map for an object created in Poser. If the OBJ format gives you trouble, try 3ds. Also, if you need to convert formats, use 3D Explorer, available at: http://www.xdsoft.com works much better. Which version of Bryce and Poser are you using?