Quote - I think thats pretty similar to what the Daz morphloader pro does for making JCM's , it basically subtracts the joint movement of the mesh from the posed morphed figure. I think so anyway. But I am a complete dummy when it comes to the inner workings of any program.

Pretty much! The slight complication is that, unlike morphs, joint rotations are not linear. Say I move a point forward (z axis) by some amount, then rotate around the y axis by 90 degrees. That turns the z movement into an x movement. So I can't just add or subtract displacements like I do when combining morphs. I have to know exactly what that rotation did.

The good news, though, is this: I don't have to know the details of how all the joint setup angles, bulges and spherical falloffs work. All I need to know is how each vertex effectively moves. Which I think should be possible to reconstruct by comparing the before and after state. I'll do some experiments when I find the time. But if someone reads this and has some more insights on Poser's inner workings than I do, your input would be very much appreciated.

-- I'm not mad at you, just Westphalian.