is the process by which a brass or bronze sculpture is cast from an artist's sculpture; in industrial uses, the modern process is called investment casting. a model of the object to be cast is created in wax, fitted with wax rods, than encased in a heat-resistant material such as plaster or clay, leaving the rodsprotruding. the ensemble is heated so that the wax melts and runs out, creating a mold. molten metal is poured into the mold through the channels created by the melted wax rods, filling the void where the wax original used to be. when the metal has cooled, the mold is broken open to release the casting.