ModsJava
Speleogenesis Overhaul
A complete Overworld generation overhaul. Seamless Voronoi cave network, mega-caverns, and vertical rifts spanning from Y -512 to 511. Pure vanilla blocks.
⬇ Download on Modrinth
Speleogenesis Overhaul
Speleogenesis Overhaul completely reimagines the Overworld generation for Fabric (Minecraft 1.20.1). Instead of the fragmented vanilla caves, it introduces a single, fully interconnected subterranean world spanning an expanded vertical range from Y -512 to 511.
⛰️ Key Features
- Voronoi Highway Network: Cave systems follow the edges of a Voronoi diagram, ensuring complete connectivity by design.
- Mega-Caverns: Explorable massive spaces including spherical chambers (60–200 blocks wide) with flat floors for building, and long elongated galleries.
- Coastal Inlets: Tidal grottos along ocean coasts that allow players to sail or dive directly into the deep cave network from the surface.
- Vertical Rifts: Narrow, sheer canyons stretching hundreds of blocks vertically, seamlessly stitching underground layers together.
- Vanilla Integration: Retains vanilla block placement, biomes, and aquifers, optimized for performance and density.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Ships as speleogenesis-0.1.0.jar — drop this file into the mods folder
- Download size: 284 KB
- Download link checked 8 Sept 2026 — working
These come from our own check of the pack file, not from the source page.