Furnace

The furnace brick allows you to alter items, such as by hardening clay objects into items that can be used, and cooking items - which can be eaten to increase your hunger level (if hunger is enabled).

 Note: Only the large furnace brick is currently working; the small furnace and campfire have no functionality.

Smelting, Baking & Cooking
Most items are not supported by the furnace, and will be burned up soon after being inserted. However, you can customize what items become (after being heated in the furnace) in the Drafting Table GUI under Item Settings. To begin heating an item, place the desired items in the furnace's input slots. Then, place a "fuel object" in the furnace's "fuel slot" (marked with a flame icon), mentioned in detail below.

Unbaked clay items - such as the bowl, jar, vessel, cistern, jug and the various molds - can be baked and turned into useable items - i.e. for item storage, water storage, etc.

Food items - such as the uncooked steak and ham - can be cooked and then eaten to increase your hunger level (eating uncooked items is unsafe and carries the risk of contracting food-born illness). Other food items - such as raw fish and the potato - are safe to eat raw, but they increase your hunger by a greater amount once cooked before being eaten.

Note: The time an item takes to smelt / bake / cook depends on the item's "durability" value, as well as it's "burn rate" - both of which can be modified via Item Settings. Also, its usually best to leave items unstacked in the furnace; stacked items will take much longer to heat, relative to the amount of items in the stack.

Fuel Objects
In order to start the furnace, you need fuel for the fire used to heat the items. Various items can be used as fuel - you can customize fuel objects in the Drafting Table GUI under Item Settings.

By default, any item that contains wood - such as the stick, branch, wooden log, board, arrow, tools with wood handles, and spear - can be used as fuel. Other items - such as the sack, backpacks, blueprints, rope, twine, cloth material, small chest and coal - can also be used. Some items are more effective as fuel than others and burn longer; coal being the most efficient. You can also customize item burn times in the Recipe and Settings Management GUI.

Note: It's recommended to stack fuel objects together in the fuel slot - items will be automatically removed one at a time when burned up, and the furnace will continue running (as long as at least one fuel object is present).