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Iris ExtensionMinecraft mod for 26.3

An extension for the Minecraft shader loader Iris with some useful features for shader developers.

client onlynewest supported release 26.3DecorationOptimization
Latest version
1.0.3+26.3
Minecraft
1.21.1 to 26.3
Java
Java 25+
Loaders
NeoForge, Fabric
Licence
CC-BY-NC-SA-4.0
Downloads
61.8k
Updated
2 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Iris Extension servers

One click and Iris Extension is installed with the right loader, on hardware built for it.

  • 26.3
  • NeoForge
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
26.3NeoForge, Fabric25+declared15 Sept 2026
26.2NeoForge, Fabric25+declared16 Jun 2026
26.1.2Fabric, NeoForge25+declared9 Apr 2026
26.1.1NeoForge, Fabric25+declared1 Apr 2026
26.1NeoForge, Fabric25+declared24 Mar 2026
1.21.11NeoForge, Fabric21+declared9 Dec 2025
1.21.1Fabric, NeoForge21+declared8 Aug 2024

Download

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

Most recently published release

1.0.3+26.3release23 Sept 2026

IrisExtension-fabric-1.0.3-mc26.3.jar · 99 KB · for 26.3 · Fabric

Download this release
99af92b5415f…
Older versions5
  • 1.0.2+1.21.1-fabric-neoforge9 Jul 20261.21.1102 KB1.6k downloads12771bb47b08…Choose file on publisher ↗
  • 1.0.2+26.29 Jul 202626.299 KB8.5k downloadse32f61023bdc…Get
  • 1.0.2+26.129 Mar 202626.1.2, 26.1.1, 26.10.1 MB10.5k downloads0344a745cddf…Get
  • 1.0.2+1.21.1129 Mar 20261.21.11100 KB9.9k downloads0131b878deaf…Get
  • 1.0.1+1.21.1116 Mar 20261.21.1133 KB412 downloads7673a80b0898…Get

Dependencies

What Iris Extensiondeclares it needs, from the author’s own release metadata. A required one has to be installed alongside it or it will not load.

Fabric APIRequired. Lightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.Iris ShadersRequired. A modern shader pack loader for Minecraft intended to be compatible with existing OptiFine shader packs

Frequently asked

Does Iris Extension work on Minecraft 26.3?

Yes. 26.3 is the newest Minecraft version Iris Extension 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 Iris Extension support?

Everything the author has declared, from 1.21.1 up to 26.3. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Iris Extension 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 Iris Extension support?

NeoForge, Fabric. 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 Iris Extension?

Among the supported Minecraft releases above, the highest recorded requirement is Java 25 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What does Iris Extension need to run?

It declares Fabric API and Iris Shaders as required, so those have to be installed alongside it or it will not load. Each one is linked in the dependencies section above.

What licence is Iris Extension under?

CC-BY-NC-SA-4.0, 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 Iris Extension?

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 Iris Extension 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.

GeckoLibA 3D animation library for entities, blocks, items, armor, and more!BookshelfAn open source library for other mods!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Enchantment DescriptionsAdds in-game descriptions for enchantments to tooltips.

Details from Modrinth, where the author last updated it on 23 Sept 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? .