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Fundamentum

Fundamentum logo

A library mod: it doesn't add much on its own. Mods built on it use it for the systems they share, so their items, stats and events work together instead of each mod rolling its own. Nearly everything is set up through datapacks.

Requires: Curios. Optional: JEI (shows portal crafting recipes).

Mods that use Fundamentum

Mods that require Fundamentum (1)
  • Ostentum: weapons, relics and summons built on Fundamentum's wings, mounts, hooks, summons and whips.

For players

  • Wings in their own Curios slot (with a cosmetic twin). Hold jump to fly, then glide. No fall damage while flying.
  • Mounts. A mount item in the mount slot plus V calls a creature to ride. V again, getting off, unequipping, dying or changing dimension puts it away.
  • Grappling hooks. A hook in the hook slot plus H fires it. It latches onto a block and pulls you there; jump to let go. A latched player takes no fall damage.
  • Summons. Items in the summon slot call minions that follow you and fight what you fight.
  • Whips with a simulated cord: the whole cord hits, the tip hits hardest, and a crack at the tip is a crit.
  • Cosmetic armour: four slots in their own screen (the button at the top right of the inventory's player preview).
  • 3D arrows in place of the flat vanilla ones.
  • Special moons and night events that tint the fog and sky, with their own spawns, effects, loot and messages.
  • Fractal skies: a moon, event or dimension can draw a fractal sky with an optional melting-vision effect.
  • Elements: hits can be fire, ice, water, electric, earth, air, poison, holy, shadow or arcane, leave auras and set off reactions.
  • Portal crafting: some items change when thrown through a portal.
  • Use sickness for potions and other consumables.
  • Tooltips for whips and hooks; any item's .desc lang lines show under its name.
  • Max health up to 1,000,000 instead of 1,024.

Keys

Key Default Does
Mount V calls or dismisses the mount in the mount slot
Hook H fires a hook from the hook slot

Both are in the Fundamentum key category.

Config

File Option Default Meaning
config/fundamentum-client.toml whips.flatHandles false flat whip handles in hand instead of 3D ones
config/fundamentum-client.toml tooltips.shiftForDetails true item descriptions and stats fold behind "Hold [Shift] for details"; false always shows them
config/fundamentum-sky-client.toml sky.fractalSkies true draw fractal skies
sky.melt true the melting-vision effect
sky.meltIntensity 0.5 0 to 1
config/fundamentum-common.toml moons.psychedelicMoon false lets the Psychedelic Moon roll (3% of nights, never a full moon)

Compatibility

Mod What Fundamentum adds Needed?
Jade looking at a playing jukebox shows the disc, a progress bar and "1:12 / 3:05"; works for every disc, modded ones too; toggle it in Jade's plugin settings ("Jukebox song progress") optional
JEI portal crafting recipes optional

Item tooltips: other mods' lines added through Fundamentum fold behind Shift too. Tag items #fundamentum:tooltip_always to keep their text open, or #fundamentum:tooltip_fold to fold a short one.

Shaders

With Iris and a shader pack, moon and night-event sky tints, whip cords and glowing item faces still show (26.1.2, from 1.25.4). The Psychedelic Moon's fractal sky doesn't show under packs that draw their own sky, such as Complementary.

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