Weight maps are basically a selection set of Polys that ususally work with hypernurbs cages(Subdivision object) or bones in high end apps. it's helps to restrict the action of the HN or Bones to specific zones on your mesh. And you usualy just paint the zones diretly on the mesh with brush set at different strengths... There's something remotely similar already in Poser: In the Cloth room you can assign points to "Constraint zones", etc... ;-) Markus