ModsFinder

Twilight Forest Cave Fix

by Danmatisk

Twilight Forest Cave Fix stops the mod's caves from being cut off when they sit beneath rivers, by removing the water check that causes it.

ForgeServer-side onlyMIT License1.20.1

What it does

The addon targets a bug where caves cut off when they lie below a river. It removes the check for water that triggers the cut, so the caves generate in full. The fix applies only to builds for 1.20.1, since later builds already include a patch for this bug.

Key features

  1. Unbroken caves

    Caves below rivers generate without being cut off, so their passages stay continuous.

  2. Water check removed

    The code that tests for water above a cave is taken out, which is the source of the cut-off.

  3. Server-side install

    Only the server needs the addon, and players join without installing anything.

Compatibility

Latest build for each game version and loader.

1.20.11.0.0
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

How it compares

Full comparison

Twilight Forest Vanilla Structures is Forge-only for 1.20 – 1.20.1, server required with an optional client, and published under All rights reserved. [FORK] Twilight Forest Thread Safety Addon is for Forge and runs on client and server under the MIT License, which is open source.

ModLoadersGame versionsEnvironmentUpdated
Twilight Forest Cave FixForge1.20.1Server-side only2025-09-15
Twilight Forest Vanilla StructuresForge1.20 – 1.20.1Server required, client optional2026-09-05
[FORK] Twilight Forest Thread Safety AddonForge1.20.1Client and server2026-02-01

Questions

Does the server need the base mod installed?

The addon is a server-side fix for the base mod on Forge for 1.20.1, so the server needs the base mod in the same setup for the caves to appear.

Is this fix needed on newer versions?

No. The bug is already patched in later builds, so the addon is only meant for 1.20.1.

Does a player need to install this addon?

No. It runs on the server alone, so players need nothing extra to join.

In the catalog

Twilight Forest Cave Fix is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 34,764 mods support Minecraft 1.20.1.

World generation mods8,515Forge modsMods for 1.20.134,764

More from Danmatisk

All projects
Not Enough Trials1.21 – 26.2Not Enough Trials Mod Integrations1.21 – 1.21.1/fill Command Unlimited1.20.1Reckless Trial Spawners1.21 – 1.21.1

Similar mods

Biomes O' Plenty1.7.10 – 26.3Cobblemon1.19.2 – 1.21.1Terralith1.18.2 – 26.3YUNG's Better Nether Fortresses1.18.2 – 26.1.2Dungeons and Taverns1.19 – 26.3Yeetus Experimentus1.18.2 – 26.3

What the author says

This addon mod prevents the Twilight Forest's caves from cutting off due to being below rivers by removing the check for water This is only for 1.20.1, 1.20.4 onwards already has this bug patched
Danmatisk, on the Modrinth page

Official listing

Owner
Danmatisk
Published
2025-09-15
Updated on Modrinth
2025-09-15
Facts verified
2026-10-15

Tags

World generation
Open on ModrinthCompare