Quote - I'm only stuck because my algorithm sometimes leaves holes in the mesh. I feel it is due to a numbers rounding issue but for the life of me I can not find it. Also uses the same publicly available marching cubes code.
 
I think that since each of us is so nearly there I would like to collaborate.

I'm also sending response by private message so hopefully my "netiquette" will be correct.

Nice one, PhilC!  :woot:  You've obviously gone much further than I did.

The approach I'm using can also generate holes, unfortunately.  I'd reached a conclusion similar to yours, but had no luck in trying to solve the problem.

Apparently a switch to marching tetrahedra could give better results.  I've ported some C code for that to Python, but haven't tested implementing it.

How does your script GUI work out, in Poser 8?  There's a bug with the new version of the parameter dials which prevents them from responding to scene.ProcessSomeEvents(), which has kept me from further development of metaballs.

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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.