ModsFinder

Sable Sub-level Loading System Fix

by Crystilcore

Sable Sub-level Loading System Fix changes how the Sable physics add-on decides which sub-levels stay loaded when a player moves away from them.

NeoForgeClient and serverMIT License1.21.1

What it does

Sable loads and unloads sub-levels, which are groups of blocks that can span many chunks. This mod replaces the rule Sable uses to decide which sub-levels count as loaded. Sub-levels that a player is near or holding should stay loaded, and the chunks inside the view distance of the player should keep their sub-level parts loaded as well, even when the player is not standing on them.

The fix targets large sub-levels that cover many chunks, which are common in modpacks and instances built around Sable. Players whose builds break apart or disappear at chunk borders can use it without changing their saves. The mod requires Sable 2.0.3 or newer, so Sable must be installed alongside it.

The mod is released under the MIT License and is not open source. It runs on NeoForge for 1.21.1 only, and the environment is client and server, so both the server and every player need it. The latest file is 1.5.3 for 1.21.1, published in the beta channel on 2026-08-20, with the first release on 2026-08-14.

Key features

  1. Sub-level load rules

    Replaces how Sable decides which sub-levels are loaded or unloaded, so the load state follows the player's position.

  2. Player-held sub-levels

    Sub-levels a player is standing on or holding stay loaded, which stops them from vanishing mid-build.

  3. View-distance chunk retention

    Chunks within the player's requested view keep their sub-level parts loaded, including parts far from the player.

  4. Large multi-chunk sub-levels

    Sub-levels that span many chunks are kept together, which helps modpacks that build large moving structures.

Compatibility

Latest build for each game version and loader.

No stable releases
Every published file is a beta or alpha build.
1.21.11.5.3
ReleaseBetaAlphaNot available

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

Requirements

Dependencies declared by the latest file for each loader.

Required 1

SableA library mod for interactive moving block structures, or "sub-levels"
Required

Questions

Which version of Sable does this mod require?

The mod requires Sable 2.0.3 or newer. Sable must be installed alongside it on NeoForge for 1.21.1.

Does the server need this mod?

Yes. Every player and the server need a copy of the mod.

Does this fix work on Fabric or Forge?

No. Files are published for NeoForge only, and the latest file is 1.5.3 for 1.21.1.

Can it be included in a modpack?

The mod is released under the MIT License, which allows use in modpacks, so it can be added to a pack's mod list.

In the catalog

Sable Sub-level Loading System Fix is one of 3,545 Optimization mods on ModsFinder, and one of 1,250 Optimization mods for NeoForge. 32,366 mods support Minecraft 1.21.1.

Optimization mods3,545NeoForge modsMods for 1.21.132,366

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What the author says

Changes how Sable determines when and how sublevels are loaded and unloaded. Prevents sub-levels from unloading when the only player loading them is dead, fixes Sable's sub-level loading and unloading when a player is on a sub-level but its holding chunk is unloaded, and keeps sub-levels loaded when any chunk within…
Crystilcore, on the Modrinth page

Official listing

Owner
Crystilcore
Published
2026-08-14
Updated on Modrinth
2026-08-20
Facts verified
2026-10-15

Tags

OptimizationUtilityGame mechanics
Open on ModrinthCompare