OK, I just modified (slightly) the FullbodyMorphs_wx4.py script.

Again, Poser 12 on MacOS Mojave.

Changes I had to make:

• the logic that got filenames for import and export did not join the filename (no path) with the path. The code properly set the config with the path, but then used ONLY the plain filename and no path (which keeps using the Poser 12 App directory since, no path). I changed it so that the path and filename were joined. Same thing happened on import; same fix. Very minor.

I did not look into wx (yet) to see if maybe the API had changed such that it was splitting those two things up, in previous versions or other platforms.

• the map (as noted before) needed to force the map object returned by map() in python 3, into the expected list. I added the map= lamda function as per above.

Those minor changes being made, the script ran without error. So far I've only tested it for simple case: Clothing conformed to figure. Figure posed. Exported. Posed clothing sculpted in Blender 2.91.2. Exported back out. Scales at 1. vertex order maintained. No re-topo happening in sculpt. Imported as a new morph. The FBM works exactly as expected. It correctly implemented the morph, subtracting the "effective morph" the pose causes. This should be super useful for constructing JCMs.

awesome!

This script is going to be an important part of clothing creation workflow using Blender :)

Next, I'm going to try a complete (single) JCM creation workflow using this script.