Attached Link: http://www.castironflamingo.com/tutorial/grouper/

Yes- Groupers a "must have" for going from Poser to Bryce (link). The Control+D export option only works with imported meshes and Bryce rocks. This way also won't have any Bryce textures applied. There's no way to export any of the Bryce primitives. I sure wish there was! Best; Dan