By editing in 3D CAD software, the central relief (relief of human head) can be cut out and some other motif can be put instead. In this model, we did not design the taper of the side walls, so you have to model it yourselves if you want to make a mold based on our model. Different materials require different degrees of taper of the side walls. If we modeled them for a particular material, we would hinder the work of all those who want to make a model of some other material.