be shure you have changed to produktion mode.i started in draftmode for faster rendering when setting up a scene, added "cast shadows" and the other checkmarks ,but its not the same as produktion-mode( shure,im the only stupid one who thought so) in draftmode the texturesize is limited to 1024( poser reduces higher textures) and other settings are different too! But, im shure the only one :-((