I would Love to hear from an experienced developer about attempting FBX with posers current Ascii format and "fall off zone"based rigging system. From what I hear, FBX is using weight maps - one weight map per joint, which means any rotation of that joint will affect the very same vertices. Bending the forearm will therefore affect the same vertices as twisting the forearm. Poser on the other hand is using separate joint parameters for each rotation direction, allowing a forearm bend to deform the ellbow region only while a twist is still able to bend the skin between wrist and ellbow. Translating Poser's joint parameters to a single weight map or vice versa will always be a compromise, I have tried in the Shockwave3D exporter, and a number of other developers have tried too. It's not that one of the two systems were better, it's just that they're too different to be compatible.