And I followed how to make one exactly as it was described on the wiki, too. 3x3 pit, filled every single square to the top with firewood, sealed it all around with dirt, left the center square open to light it, lit it, sealed the hole, and waited the requisite 18 hours (longer, actually). But when I opened it up, it was completely empty! What's going on? EDIT: Oh wait, I lit the actual wood before I closed it up. You're supposed to put a firepit on TOP of the wood, light that, then seal it. The wiki didn't make that very clear.