Poser has "alternate geometry" settings, though I've never used them with weight-mapped figures. Few products ever make use of that and, to be honest, it can be extremely handy. IIRC, one of Hongyu's "Sportbaby" jackets makes excellent use of the alternate geometry function, since it would be near impossible to produce that effect in Poser, otherwise, with good quality, hand sculpted, "life-like" results. (Open/Closed-and-zipped morph, hood up-down, morphs, etc I think) However, it's set with a "Pose" and, IIRC, that was old-tech and alternate geometry can now be keyed to a dial. Though, again IIRC, that will require all the geometry to be loaded in memory when the item is loaded instead of called on demand by the Pose.