
OptimumFuse
[1.21.5] [Fabric📜] An open-source modpack that improves the game's performance and visuals, inspired by OptiFine, while staying true to the vanilla…
⬇ Download on Modrinth







OptimumFuse

For Fabric📜
An open-source modpack that improves the game's performance and visuals, inspired by OptiFine, while staying true to the vanilla Minecraft experience.
All optimizations in the modpack are based on Exceptionally Optimized.
If you find a bug or want to suggest any feature, you can issue a 🐞Bug Report | 💡Suggestion. Alternatively, we have a Discord server.
🧪Versioning
This project uses semantic versioning.
Format:
`X`.`Y`.`Z`+``.``Definitions:
(a) Project Version
X: MAJOR version (Not likely to change; for a long time!)Y: MINOR version (Will change frequently; For new MC versions/Big updates)Y: PATCH version (Will change very frequently; Small changes/Mod updates/...)
(b) Build Metadata
<loader>: Values:fabric<mc-version>: Examples:1.16.5,1.19.2,1.20.1and so on...
Pre-release Versions' Format:
`X`.`Y`.`Z`-``+``.``<pre-release>: (For untested/breaking changes/not ready for use versions)
Values:
i) alpha
ii) beta
🎲Mods Used
You can find all the mods included in this modpack under the Dependencies section, on the Modrinth Versions page.
📱Awesome Features:
🌆AwesomeShaders

⛏️FancyTooltips

✨CoolEffects

🔎3DParticles

🏃♂️BetterPlayerAnimations

🍀OptiFineParity


and much more...!
📈Automated Publishing
All releases are published using Kir-Antipov's GitHub Action. The workflow file can be found here.
📜License
Check the complete license here: Apache License 2.0!
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Downloads as OptimumFuse 1.16.0+fabric.1.21.1.mrpack
- Download size: 380 KB
- Download link checked 24 Aug 2026 — working
These come from our own check of the pack file, not from the source page.