Indium Mod (1.21.1, 1.20.6) – Sodium Integration

Indium is a utility mod for Minecraft that serves as an addon for Sodium, providing full support for the Fabric Rendering API on both Fabric and Quilt mod loaders. Developed by comp500 and based on the Indigo reference implementation, Indium bridges the compatibility gap between Sodium's rendering optimizations and mods that depend on the Fabric Rendering API to display advanced textures, models, and visual effects.

Here's the problem every modded Minecraft player on Fabric has faced: you install Sodium for its dramatic performance gains, then load up your favorite visual mods only to find broken textures, missing models, and glitched block faces everywhere. That's because Sodium replaced the vanilla renderer entirely, and mods relying on the Fabric Rendering API had nowhere to hook in. Indium was built specifically to solve this frustrating incompatibility. With over 35 million downloads since its release in July 2021, it became one of the most essential companion mods in the Fabric ecosystem — a quiet workhorse that most players never thought about but couldn't play without. Its importance to the community is underscored by the fact that Sodium eventually adopted Fabric Rendering API support directly, a decision clearly influenced by the demand Indium demonstrated.

Key Features of Indium

• Fabric Rendering API Support for Sodium — Indium re-implements the Fabric Rendering API on top of Sodium's optimized renderer. This means mods that rely on custom block models, connected textures, and advanced rendering effects work seamlessly alongside Sodium without reverting to the slower vanilla pipeline. You get the best of both worlds: Sodium's speed and full mod compatibility.
• Based on the Indigo Reference Implementation — Rather than building a rendering layer from scratch, Indium is built upon Indigo, the official Fabric API reference implementation maintained by the Fabric team. This approach ensures high compatibility and correctness, since Indigo defines the standard behavior that all Fabric Rendering API mods are developed against.
• Compatibility with Popular Visual Mods — Mods like Continuity (connected textures), LambdaBetterGrass (improved grass rendering), Campanion, Bits and Chisels, and Packages all depend on the Fabric Rendering API. Without Indium, these mods either fail to load or display severely broken visuals when Sodium is installed. Indium restores full functionality to all of them.
• Negligible Performance Overhead — Indium appears to be lightweight enough that its impact on frame rates is minimal according to the developer. The mod acts as a compatibility bridge rather than a rendering overhaul, so it doesn't introduce heavy processing of its own. Any performance changes you notice are more likely caused by the rendering mods themselves, not Indium.
• Dual Loader Support (Fabric & Quilt) — Indium works on both Fabric Mod Loader and Quilt Loader, covering the two major mod loaders in the Fabric ecosystem. Whether you've committed to Fabric or migrated to Quilt for its additional features, Indium integrates without any extra configuration or separate builds.
• Wide Version Coverage — Indium supports Minecraft versions from 1.16.5 all the way through 1.21.1, spanning multiple major game updates. This extensive version range means players on older modpacks and those running the latest releases can both benefit from the mod's compatibility layer.
• Open Source Under Apache 2.0 — The entire codebase is available on GitHub under the permissive Apache 2.0 license. This transparency allows other developers to audit the code, contribute improvements, and fork the project if needed — which is exactly how the broader modding community benefits from open development.

Screenshots

How to Install Indium

1. Install Fabric API and Fabric Mod Loader for your Minecraft version (or Quilt Loader if you prefer). Indium requires a working Fabric or Quilt environment before it can function.
2. Download and install Sodium version 0.2.0 or newer (but older than 0.6.0). Place the Sodium .jar file in your mods folder. Remember: Indium is specifically an addon for Sodium and does nothing without it.
3. Download the correct Indium version for your Minecraft version from the download section below. Make sure the Indium version matches both your Minecraft version and your Sodium version to avoid crashes.
4. Place the Indium .jar file into your .minecraft/mods folder alongside Sodium and Fabric API. No additional configuration files or settings are needed — Indium activates automatically.
5. Launch Minecraft through your Fabric or Quilt profile. If installed correctly, mods that depend on the Fabric Rendering API (such as Continuity) should now display their textures and models properly.

Requirements & Compatibility

What's New

• Version bump to support newer Sodium 0.5.x backport builds, ensuring compatibility with the latest pre-0.6.0 Sodium releases.
• Updated GitHub Actions artifact upload step for improved build and release automation.
• Minor internal version corrections to align release numbering with Sodium compatibility ranges.
• Important context: Since Sodium 0.6.0 now includes native Fabric Rendering API support, Indium is no longer required for players on the latest Sodium builds. This final update focused on legacy Sodium version support.

Pros and Cons

Alternatives to Indium

• Sodium — Starting from version 0.6.0, Sodium includes built-in Fabric Rendering API support, making it the direct successor to what Indium provided. If you're on a current Minecraft version, Sodium alone is all you need.
• OptiFine — The long-standing performance and visual enhancement mod for Minecraft that includes its own rendering pipeline. OptiFine handles connected textures and custom models natively, though it runs on Forge rather than Fabric.
• Iris Shaders — A Fabric-based shader mod designed to work with Sodium. While Iris handles shader packs rather than the Fabric Rendering API, it's part of the same Sodium ecosystem that Indium complemented.

Download Indium

Always download mods from official sources to stay safe.

Frequently Asked Questions

Do I still need Indium for Minecraft in 2025?

No — if you are using Sodium 0.6.0 or newer, Indium is no longer needed. Sodium now includes native support for the Fabric Rendering API, which was the sole purpose of Indium. Only players stuck on Sodium 0.5.x or older for legacy modpack reasons should continue using Indium.

What happens if I install Indium with Sodium 0.6.0?

It will cause compatibility issues. Indium is not designed to work with Sodium 0.6.0 or later, and the mod developer explicitly warns against using the two together. If you've updated Sodium, remove Indium from your mods folder to avoid crashes or rendering glitches.

Which mods require Indium when using older Sodium versions?

Any mod that uses the Fabric Rendering API requires Indium when paired with Sodium 0.5.x or earlier. Known examples include Continuity (connected textures), LambdaBetterGrass, Campanion, Bits and Chisels, and Packages. Without Indium, these mods display broken textures and missing block models.

Does Indium replace Sodium or work without it?

No — Indium is strictly an addon for Sodium and has no function on its own. You must have Sodium installed for Indium to activate. Without Sodium, the standard Indigo implementation in Fabric API handles the Fabric Rendering API by default, so Indium isn't needed.

Is Fabric API required alongside Indium?

Yes — both Fabric API and Sodium must be installed for Indium to work correctly. Fabric API provides the Fabric Rendering API definitions that mods code against, while Indium provides the actual implementation of that API on top of Sodium's renderer. Missing either dependency will prevent Indium from functioning.

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