i am doing a boolean difference operation with a human head and a cube to make a mold for the head. after numerous attempts i can achieve the boolean diffenence however, the head has a mouth cavity and that cavity does not get removed from the cube. i've tried to fill the head to make it solid but there not way to do that. i've tried shrinkwrap too but that doesnt work. is there anyway to just get the exterior of the head
to be removed from the cube?
i want to print the mold (cubes) not the model, then use that to pour conventional materials such as plaster of paris.