Fabricae Ex Nihilo - Creating from Nothing

"Create from Nothing"
There are no non-renewable resources in the world. Gain access to everything you need, even when stranded in the void of skyblock worlds and similar locations.
Barrels - Universal Transformers

Barrels in Fabricae Ex Nihilo perform multiple functions and are used in various recipes:
Alchemy: Adding items to fluid to obtain new substances - liquids, blocks, or entities. For example, adding dust to water creates clay.
Fluid Transformation: Changes the fluid inside the barrel depending on the block beneath it. For example, water turns into witch water when there's mycelium under the barrel.
Composting: Transforming items into blocks. For example, saplings produce dirt.
Leaking: Transforms adjacent blocks based on the fluid inside the barrel. For example, sand turns into soul sand next to a barrel of witch water.
Milking: Produces fluids when an entity is above the barrel. For example, cows give milk.
Fluid on Top: Turns the fluid inside the barrel into a block based on the fluid above it. For example, placing water above a barrel of lava creates obsidian inside.
Milking Example

Hammers for Crushing
Breaking blocks with a hammer transforms them into other blocks, opening new crafting possibilities.
Crooks and Silkworms
Breaking leaves with crooks may yield silkworms. Using silkworms on leaves creates infested leaves. After infestation is complete, breaking these leaves with a crook gives string.
Crucibles for Fluid Production
Wooden crucibles cannot hold hot liquids (such as lava). Organic materials produce water, while stones (with a heat source under the crucible) create lava.
Sieve for Sifting
The sieve uses meshes (made of string, flint, iron, diamonds, etc.) and blocks to sift for resources. Different blocks when sifted yield various resources - from saplings and seeds to ore pieces and diamonds.
Strainers for Fishing
Strainers catch fish over time, providing a constant food source in isolated worlds.