GeoTectonic

By
Alkeari

Vanilla's tangle of noodle caves is gone. In its place the underground is solid rock cut by eight hand-designed cave systems, each with its own shape, biome rules and reward for finding it.

A long, winding tunnel deep underground, carved dry, with amethyst and ores in its walls. Its name appears as you enter.
The whole length of one Dry Passage, seen through the rock from below.
Every setting can be changed in game, from Mod Menu on Fabric and the Config button in the mod list on Forge and NeoForge.
The same seed and spot seen from below: with suppression off, their caverns; with suppression on (the default), the same rock left solid.
A shaft opens into a chamber flooded to its middle and lit by glow berries. Its name appears as you enter.
One Cenote seen through the rock from below: the flooded chamber and the shaft rising from it.
A straight gallery at deepslate depth with iron, gold, copper and redstone in its walls and amethyst along them. Its name appears as you enter.
The length of one Crystal Vein seen through the rock, its ores and amethyst lining the gallery.
A winding passage with a flowing channel, moss, hanging roots and clay. Its name appears as you enter.
Erosion Cave passages seen through the rock from below, their water channels winding through them.
A domed chamber of calcite with pointed dripstone and cave vines hanging from its roof. Its name appears as you enter.
A Karst Chamber seen through the rock from below: the central hub with its pool, the smaller chambers around it and the passages joining them.
A flooded passage with seagrass on its floor, running back from the coast under a low rock roof. Its name appears as you enter.
A wider flooded chamber of a Sea Cave, its water open to the air under the rock roof.
$Thumbnail A deep fracture walled with basalt and blackstone, studded with magma and pooled with lava. Its name appears as you enter.$
A deep fracture walled with basalt and blackstone, studded with magma and pooled with lava. Its name appears as you enter.
A Tectonic Fracture seen through the rock: a long sloping rift with lava along its floor.
A deep chamber of blackstone and basalt with a floor of magma. Its name appears as you enter.
Looking up the chimney that rises from a Volcanic Vent's chamber.
A Volcanic Vent seen through the rock: the magma-floored chamber with its chimney rising above it.
When a newer GeoTectonic is out for your Minecraft version and loader, a chat message names it with a download link, once per game start; check_for_updates in config/geotectonic.toml turns it off.