The altar and offering table each have one offering slot that can hold up to 64 items, with no GUI. Right-click with an item to insert it, or right-click empty-handed to extract. Pipes and hopper-like automation can access the item slot.
4The altar consumes a charged Eulogia Crystal, while the offering table only requires Celestial Stone.
The altar must be high enough in the sky and inside a valid offering circle. The required height is Y=96 by default. Put the main ingredient on the altar and the offerings on the four side tables; table order does not matter.
Once the ingredients match, particles appear and the ritual begins. When it finishes, the ingredients are consumed and the result appears in the altar slot. If it cannot fit, the remainder drops above the altar.
A tier 3 altar completes offerings four times as fast by default and can also craft tier 1 and tier 2 recipes. Server settings may change its speed.
With Jade installed, looking at an altar or offering table shows the offering currently placed in it. Empty offering slots are not listed.