From 2D to real life... these finger bones are made of clay. The ring is steel (with a 7 to 8 inch diameter) and stolen from another project for the time being. I am trying to figure out the best way to encapsulate the bones within a finger. I am hoping that smooth-on has a foam substance that I can cast around the bones and then carve to the shape I want. Any and all material suggestions are welcome. Feel free to leave any constructive comments.