OptimumFuse

Name: OptimumFuse
Price: 5.2 EUR
Author: UltimatChamp

[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 Minecraft experience.

by UltimatChamp

41.6K Downloads

0 Followers

fabricquiltneoforgeforgeMC 1.21.5lightweightmultiplayeroptimization

Rent OptimumFuse Server View on Modrinth

Screenshots

About this Modpack

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, 1.20.1 and 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!

Available Versions

OptimumFuse 1.16.0+fabric.1.21.1release

MC 1.21.1fabric1.2K downloads

November 5, 2025

OptimumFuse 1.14.6+fabric.1.21.4release

MC 1.21.4fabric480 downloads

May 7, 2025

OptimumFuse 1.14.5+fabric.1.21.4release

MC 1.21.4fabric386 downloads

April 10, 2025

OptimumFuse 1.14.4+fabric.1.21.4release

MC 1.21.4fabric198 downloads

April 1, 2025

OptimumFuse 1.14.3+fabric.1.21.4release

MC 1.21.4fabric61 downloads

March 31, 2025

How to Set Up a OptimumFuse Server

Order Server

Choose at least 4 GB RAM (6 GB recommended for OptimumFuse). Based on player count: per 5 players.

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "OptimumFuse" and click "Install". The fabric loader and Minecraft 1.21.5 are configured automatically.

Start Server & Play

Start the server – all mods are loaded automatically. Share the server IP with friends and play together!

Frequently Asked Questions

OptimumFuse server crashes or won't start – what to do?

Most common causes: insufficient RAM or wrong fabric loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 6 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.

How much RAM does a OptimumFuse server really need?

Minimum 4 GB, recommended 6 GB for stable performance. per 5 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €5.2/month).

Can I add custom mods to OptimumFuse without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.5). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.

OptimumFuse server lagging – performance tips

1) Increase RAM to 6 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.