Oh, frustrum culling and all that.  Right.  I think I have some sample code lying around somewhere for that sort of thing, from when I was trying to program a 3D game in Game Maker.

But it wouldn't just be a case of finding the distance to the camera for each vertex?  See, I tend to make rather simplistic assumptions about things like this before I stumble into them....  LOL

I hope to experiment with these ideas soon.  If anyone else wants to jump in ahead of me, feel free.  :D 

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.