Umm. "Bug" from the Micronauts or "Nightcrawler" from the X-Men? I have been thinking about transplanting the hands from the Zygote Free Elf, to have a figure with three fingered hands. Seems like this should work after a bit of .cr2 editing. Are you trying to merge the fingers? Can you use the Poser magnets to shrink the unnecessary fingers and enlarge the others?

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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.