ModsFinder

Block Limit Fix

by tropheusj

Block Limit Fix lifts the vanilla cap of 524288 total blockstates, so block states beyond that count no longer break server packet serialization.

FabricForgeQuiltServer-side onlyMIT LicenseOpen source1.16.5 – 1.19.3

What it does

The mod fixes a vanilla bug that limits the total number of blockstates to about 500k. Beyond 524288 states, the math used when serializing states in packets breaks down because of a misplaced calculation. Block Limit Fix repairs that calculation so worlds and modpacks with many blockstates keep working. The fix is also backported to older versions and stops being needed once a later vanilla release includes it.

Block Limit Fix runs on the server only, so players join without installing it. It is released for Fabric, Forge and Quilt across the 1.16.5 – 1.19.3 range, with 1.0.5 as the latest file for 1.19.3. The code is open source under the MIT License.

Key features

  1. Blockstate limit fix

    Removes the vanilla cap that breaks serialization of block states past 524288.

  2. Packet serialization repair

    Corrects the misplaced math in state packets so large blockstate counts stay in sync.

  3. Backported fix

    Older game versions receive the same repair, which ends once a later vanilla release includes it.

Compatibility

Latest build for each game version and loader.

1.19.31.0.5-fabric1.0.5-forge1.0.5-fabric
1.19.21.0.5-fabric1.0.5-forge1.0.5-fabric
1.18.21.0.5-fabric1.0.5-forge1.0.5-fabric
1.17.11.0.5-fabric1.0.5-forge1.0.5-fabric
1.16.51.0.4-fabric1.0.4-forge1.0.4-fabric
ReleaseBetaAlphaNot available

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

Questions

Does Block Limit Fix need to be installed on player clients?

No. It is server-side only, so only the server needs the mod installed.

In the catalog

Block Limit Fix is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 7,205 mods support Minecraft 1.19.3.

Library mods3,514Fabric modsMods for 1.19.37,205

More from tropheusj

All projects
Create Fabric1.18.2 – 1.20.1Milk+1.16.5 – 1.20.1Yeet1.20.1 – 1.21.1Bing Bing Wahoo1.17 – 1.20.1Stonecutter Recipe Tags1.16.3 – 1.19.3It's as Shrimple as That1.20.6 – 1.21.10

Similar mods

Fabric API1.14 – 26.3Cloth Config API1.14 – 26.3YetAnotherConfigLib (YACL)1.19 – 26.3Architectury API1.16.5 – 26.3Just Enough Items (JEI)1.8 – 26.3Geckolib1.12.2 – 26.3

What the author says

Specifically, beyond 524288 states, the math for serializing the states to packets breaks down due to a misplaced cast. This bug is fixed in 1.19.4 / 1.20, whichever comes first. This mod backports it to older versions. Thanks to Patbox for debugging this and figuring out the solution.
tropheusj, on the Modrinth page

Official listing

Owner
tropheusj
Published
2022-12-19
Updated on Modrinth
2023-10-05
Facts verified
2026-10-15

Tags

LibraryUtility
Open on ModrinthCompare