I've been using 3d printing to make gaming terrain. That's cool, but there's a time issue. That piece took a couple of hours to print. Doing enough for a large room takes days, or weeks for a sizable dungeon. Pieces can be reused, certainly, but that's still a lot of lead time, and if I want to have terrain representing, say, forest floor vs. natural cave vs. paved dungeon floor, that's either a lot of repainting or a lot of new prints. Then I saw that there are people selling reusable rubber molds for casting terrain pieces. You can mix up a little plaster or, if you're willing to spend a little extra, dental stone, fill up several of them at a go, pop them out a few minutes later once it sets adequately, and in...well, not no time at all, but in vastly less time than it'd take to print them out, you've got an awful lot of terrain to play with. So I wondered: Can I do that? And the answer is yes. I got some two-part silicone rubber stuff which