And... missed my edit cutoff.  :unsure:

Another complication with UV blending as opposed to on-or-off UV switching.  The two textures for the UV sets being blended would also have to be blended, frame by frame.  The texture pixel positions would have to be recalculated relative to the shifted UVs, for both textures.  Then they would need to be appropriately blended together for each frame and a new texture file written.  The texture file would need to be applied to the geometry.  Then the blended frame could be rendered.

This, for each frame.  At render time.  Complicated!  Hoofa!  :lol:

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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.