Make a five-sided, silicon rubber mold out of pre-cast miniature terrain pieces, something you make out of the clay provided at the beginning of the class, or another non-licensed object you bring with you. Techniques will be taught for molding porous and non-porous objects, 6-sided molds, etc. The mold you make is yours to take home, though you have the opportunity to use it before you leave Gen Con in the resin or plaster casting classes taught by the same instructor.