jschoen wrote: but I kept getting garbage on the inbetween morph - You will. As a morph target scaling parameter dial is moved, the affected vertexes always move in straight lines. You would need a Poser model with each hinged or sliding part as a separate jointed part, and then wait until someone has put into Poser an ability for two parts which share vertexes but they are not parent and child, not to split apart in movement.