Student work at the Rhode Island School of Design.
The chopines are created in a multi-phase casting process:
First the feet were cast in alginate to make plaster moulds.
Next, a block of wax was cast against the bottom of the plaster foot and the form of the chopine was carved from that block of wax.
From this form, a plaster-block casting was made to enable the form to be recreated as a hollow-wax casting.
The hollow-wax casting was then dipped into industrial ceramic for the traditional lost-wax method of aluminum casting.