ModsFinder

Iris Extension

by Merlin1809

Iris Extension adds a few extra features to the Iris shader loader, aimed mainly at shader developers who use the loader's Minecraft shader support.

FabricNeoForgeClient required, server optionalCreative Commons Attribution Non Commercial Share Alike 4.01.21.1 – 26.3

What it does

The mod extends Iris, the Minecraft shader loader, with a small set of features that shader developers can use while building or running shaderpacks. Without a shaderpack that uses these features, the mod has no visible effect. Installing it needs Fabric API, Forgified Fabric API, Iris Shaders and Sinytra Connector, and it is released under the Creative Commons Attribution Non Commercial Share Alike 4.0 license, so it is not open source. Files cover 1.21.1 – 26.3, with Fabric builds up to 1.0.3+26.3 and NeoForge builds up to 1.0.2+1.21.1-fabric-neoforge for 1.21.1.

Key features

  1. Shader developer features

    Adds options to Iris that shaderpacks can call, aimed at developers building custom shader effects.

  2. Eclipse Bliss support

    Current shaderpacks that use the extension's features, such as the Eclipse Bliss edit, work with it.

  3. Optional for players

    Players only need the mod when a shaderpack depends on it, and the server does not need to run it.

Compatibility

Latest build for each game version and loader.

26.31.0.3+26.3Not available
26.21.0.2+26.2Not available
26.1.21.0.2+26.1Not available
26.1.11.0.2+26.1Not available
26.11.0.2+26.1Not available
1.21.111.0.2+1.21.11Not available
1.21.11.0.2+1.21.1-fabric-neoforge1.0.2+1.21.1-fabric-neoforge
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 2

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

How it compares

Full comparison

Monocle is an Iris companion for NeoForge 1.21.1 that is open source under the GNU Lesser General Public License v3.0 only and runs on the client alone. Shader Toggle targets Fabric 1.21.11 under the Creative Commons Attribution 4.0 license, is not open source, and needs both client and server.

ModLoadersGame versionsEnvironmentUpdated
Iris ExtensionFabric and NeoForge1.21.1 – 26.3Client required, server optional2026-09-23
MonocleNeoForge1.21.1Client-side only2025-07-23
Shader ToggleFabric1.21.11Client and server2026-03-15

Questions

Does Iris Extension need Fabric API?

Yes. Fabric API and Forgified Fabric API are required, along with Iris Shaders and Sinytra Connector.

In the catalog

Iris Extension is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 8,071 mods support Minecraft 26.3.

Optimization mods3,545Fabric modsMods for 26.38,071

Similar mods

Sodium1.16.3 – 26.3Iris Shaders1.16.5 – 26.3Entity Cullingb1.7.3 – 26.3FerriteCore1.16.5 – 26.3ImmediatelyFast1.18.2 – 26.3Sodium Extra1.16.2 – 26.3

What the author says

An extension for the Minecraft shader loader Iris. This mod needs a shader that utilizes its features, otherwise it will do nothing!
Merlin1809, on the Modrinth page

Official listing

Owner
Merlin1809
Published
2026-03-16
Updated on Modrinth
2026-09-23
Facts verified
2026-10-15

Tags

DecorationOptimization
Open on ModrinthCompare