Campfire

A vanilla block. Feedback keeps what it does and gives it a second job as a fire under a vessel.

In vanilla

It cooks up to four food items placed on it into a fixed cooked item after a set time, sends up smoke, hurts anything standing in it, and burns forever on no fuel once lit. Water or a shovel puts it out; flint and steel or a fire charge lights it again. The soul campfire is the same block with blue flame.

In Feedback

Lighting, water and shovels, smoke and damage are unchanged, and food is still placed on it (right-click, up to four). Cooking is different: nothing is output on a timer. Food on the fire warms toward the flame like food in a Skillet pan, and cooks, dries and chars by the same rules as in a Furnace: it is safe (live organisms dead) only once it has actually cooked through, and it burns if left. Right-click with an empty hand to take the last piece off, carrying its heat. Placed food and the campfire itself are Feedback's own copy of the block (an old one is swapped on load). On top of that, a lit campfire is a fire fixed at 760 Tu, the flame temperature of wood, that never runs out. A lit soul campfire burns hotter, at 1050 Tu:

• Under a vessel. A Crucible or Boiler placed straight over a lit campfire climbs toward 760 Tu and stays there. Hot enough to boil water, cook, and melt the soft metals (tin, lead, zinc); too cool for copper, gold or iron. A soul campfire also melts copper, bronze, brass, gold and silver, but stays too cool for cast iron and steel; for those you still need Lava or a Firebox. For more heat, use a Firebox or Lava.
• Put it out, the heat stops. An unlit campfire is no fire at all.