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CLabMinecraft mod for 1.21.1

Bringing Hardware Occlusion Culling (HOC) to Minecraft entity rendering optimization.

client onlynewest supported release 1.21.1Optimization
Latest version
26.3.1
Minecraft
1.20 to 1.21.1
Java
Java 21+
Loaders
Fabric, Quilt, NeoForge, Forge
Licence
LGPL-3.0-only
Downloads
1.6k
Updated
6 mo ago
Available on
Modrinth

Minecraft versions

Every version CLab declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, Quilt, NeoForge, Forge21+declared8 Aug 2024
1.21Fabric, Forge, NeoForge, Quilt21+declared13 Jun 2024
1.20.1Quilt, Fabric, Forge, NeoForge17+declared12 Jun 2023
1.20Fabric, Quilt, NeoForge, Forge17+declared2 Jun 2023

Download

From CLab’s own host. Nothing is re-hosted here.

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • NeoForge

    26.3 · 3 May 2026 · clab-neoforge-1.21-26.3.jar

    Get NeoForge

Most recently published release

26.3.1beta4 May 2026

clab-forge-1.20.1-26.3.1.jar · 0.8 MB · for 1.20.1, 1.20 · Forge, NeoForge

Choose file on publisher ↗
60be4df8ff9c…
Older versions3
  • 26.33 May 20261.21.1, 1.2147 KB15 downloadsf8f1d04bb75a…Get
  • 26.22 May 20261.21.1, 1.2137 KB11 downloadse0f6f0e2175c…Get
  • 26.12 May 20261.21.1, 1.214.2 MB8 downloads6b5e47c56c91…Get

Frequently asked

Does CLab work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version CLab declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does CLab support?

Everything the author has declared, from 1.20 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install CLab on the client or the server?

The client only. There is nothing to install on the server side. That is the author's declared design, not a guarantee for every server: one running anti-cheat or missing a counterpart mod can still object.

Which platform or loader does CLab support?

Fabric, Quilt, NeoForge, Forge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for CLab?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What licence is CLab under?

LGPL-3.0-only, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install CLab?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download CLab safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Details from Modrinth, where the author last updated it on 4 May 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .