I'm afraid if you want texture maps on your Poser figures in Bryce, upgrading is the only answer. DXF does not support texture coordinates (as far as Bryce is concerned), so that's all she wrote. Bryce3D will do the job you need, and has been given away free on magazine CDs here in the UK. You should be able to find this package free or very cheap somewhere (don't ask me please, I haven't got one). Make sure you patch it to 3.1.