I was doing a little research on rendering and ran across an open source, command line render software program called Aqsis (pronounced axis).
From the website:
"Aqsis is a high quality, photorealistic, 3D rendering solution. It complies with the Renderman® interface standard defined by Pixar.
Aqsis comprises a command line rendering tool, a tool for compiling shaders in the RSL language, a tool for preparing textures for optimal use, and various developer libraries to enable integration with third party tools.
Aqsis is licensed under the GPL license, with some parts under the LGPL."
Aqsis will render a RIB file (RenderMan Interface Bytestream) that can be exported by Poser 6, possibly earlier versions and other programs as well.
For those that like to try this type of software, the way is:
http://www.aqsis.org/xoops/modules/news/
Additional information on Renderman is located here:
http://www.renderman.org/RMR/index.html