This early prototype made less extensive use of the silicone rubber skin - the rubber only partially covered the fingers and thumb. Hard plastic parts not covered by silicone rubber have surfaces derived from the 3D scan hand model, although the effect is largely lost because the areas are so small. This prototype had a lot of issues: the rubber pulled away from the hard plastic and the overall appearance didn't really recall the original 3D scan hand model. I also generally wanted as much surface area as possible to be silicone rubber.