First: SAMS3D uses Autocad to make their props, so Sharen will most likely jump in and give you advice. About the polygon count: Less is better. The fewer possible polys, the more stuff you will be able to load into the scene before Poser starts to crawl.

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.