Ooh.  Thanks for pointing out the bug.  I pasted in the myMesh class from the earlier adaptation I'd started for your .pyd, where I would have needed the vpolys for a function which doesn't appear in the script I posted.  I just forgot to remove it.  D'Oh!

It looks like your alterations to the vertnorms function work very nicely.  No precedence issues.

Just to clean things up, here's the script with the alterations Spanki has pointed out....

Note that when I comment that this script isn't fast enough to do away with the octree, I'm commenting on point-in-tri handling which uses the .pyd for faster math but doesn't use a compiled point-in-tri function from the .pyd for the really slow calculations.  It will be even faster with a compiled (and optimized, as Spanki's point-tri code is, compared to what I used) test for the triangle collisions.  We'll probably still want octree for dense meshes....

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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.