Attached Link: http://www.daz3d.com/support/tutorial/index.php?id=909

Go to the material room, advanced mode; Select the GROUND props and unselect "Shadow Catch Only" Plug a "reflect" node in the reflection color of the PoserSurface. The reflect node is found when you right click, in the Raytrace submenu. Befor rendering, be sure that raytracing is enabled. By the way, it will be much much easier to find a reflective material (some comes directly woth Poser6) and try them. That's the basic... Here is a tutorial for Poser5, but works exactly the same in Poser6.