You people testing out GI... you're not going to get "real" radiosity lighting effects with a single figure on a ground plane. You're going to need props for the light to bounce off of, or an enclosed environment for the same reason.
The shadows for the figures above are all completely wrong in terms of realistic radiosity lighting, because the light is only bouncing off the floor and off the figure and then going... nowhere, off into the Poser universe never to be seen again.

Stand someone up in an empty room in real life. There's no way you'll get shadows like those without a very bright light, in which case you'll lose features on the person herself.