This creates spheres or other shapes (right now faceted sphere, smoother sphere, jack-o-lantern - others will be added) using an old method of a jacketed mold.
You will need to print the outer-mold (jacket) as well as both halves of the inner-mold. In the case of the spheres, you print 2x of the mold. In the case of the jack-o-lantern, you will need to print both spheres and do one at a time.
Put both inner-molds into the outer-mold, then use the press to push in the slab of clay.
No supports necessary. STLs are small - scale up to whatever you want.
The author hasn't provided the model origin yet.