final StrongholdBlockMaterialPicker stone = new StrongholdBlockMaterialPicker(getRandom());
// General shape
box.setPicker(stone);
box.setMinMax(-3, 0, 0, 7, 7, 15).fill();
// Place the door
new IronFenceDoor(this).place(1, 1, 0);
// Some stone for the side lava pools and ceiling
box.setMinMax(-2, 6, 1, -2, 6, 14).fill();
box.offsetMinMax(8, 0, 0, 8, 0, 0).fill();
box.setMinMax(-2, 6, 1, 5, 6, 2).fill();
box.offsetMinMax(0, 0, 13, 0, 0, 12).fill();