Immersive Fixes

Immersive Fixes

Addon for Immersive Engineering, backporting critical bug fixes and minor content to 1.20.1

by
345.0K Downloads
forgegame-mechanicstechnologyutility
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Screenshots

Mulitblock with water next to it

About this Mod

Overview

A simple Immersive Engineering addon to backport critical bug fixes and minor content to 1.20.1. 

Note that in some cases I am not the one who patched these issues, BluSunrize (and the IE team at large) is. I merely backport the fixes to 1.20.1 with permission, so the IE dev team can pursue their goal of focusing on new versions of Minecraft. Elsewhere, I and other contributors have written entirely new fixes that don't rely on IE's code. Do not be annoyed at Blu and co. for not implementing these fixes themselves, as back support is time consuming and difficult for a project of IE's scale.

Currently Supporting:

Fixes of reported IE problems:

Fix: issue #5906: Fluids no longer destroy multiblocks.

Fix: issue #6149: Arc Furnaces give the correct percentage of secondary outputs (was previously inverted).

Fix: issue #6305: Coke Oven Exploit

Fix: issues #4917, #5440, #5909, #5933, and #6203 about logic errors with the Diesel Generator. Diesel Generators now don't confuse water for fuel, don't run infinitely, properly consume the right amount of fuel, and more. Read these issues on IE's repo for detail (or check the issue on my repo to find hyperlinks to each of these issues).

Fix: issue #6205: ear defenders not working.

Other fixes:

Fixed dark triangle-shaped patches appearing on machines under normal lighting

Fixed parts of machine surfaces rendering inside-out or invisible from certain angles

Fixed machines showing outdated/stale textures after reloading resource packs via F3+T

Improved rendering performance: large machines no longer draw the same geometry up to 7 times over

Have some features or fixes you'd like to see in 1.20.1? Please let me know via the Issues page on the repository or my discord here.

Credits

Many thanks to Nerf Ashton for making this mod's icon! Thanks also to IFx's other contributor, tgstyle, for numerous client sided fixes and general polishing!

Licensing

Immersive Fixes' codebase should be considered ARR for any and all purposes unless I explicitly grant your project a waiver. I would, however, love to grant as many of those as possible. Additionally, contribution to Immersive Fixes is welcome and encouraged! Collaboration on creating fixes is also welcome. If you are looking for a waiver or looking to contribute or collaborate, please directly contact me through Discord, GitHub, or CurseForge. Please note that waivers will only be given out if you can demonstrate that they are the only reasonable remedy to the current problem you're facing.

Available Versions

Immersive Fixes 1.6.1release
MC 1.20.1forge
July 23, 2026
Immersive Fixes 1.6.0release
MC 1.20.1forge
July 11, 2026
Immersive Fixes 1.0.5p3release
MC 1.20.1forge
July 3, 2026
Immersive Fixes 1.0.4release
MC 1.20.1forge
February 16, 2026
Immersive Fixes 1.0.3release
MC 1.20.1forge
October 18, 2025

How to Install Immersive Fixes on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.20.1).

3

Install Mod

Open the mod browser in the dashboard and search for "Immersive Fixes". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

forge

Minecraft Versions

1.20.1

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Immersive Fixes server crashes on startup – what to do?

Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.20.1). You can switch loaders with one click in the panel.

Is Immersive Fixes compatible with forge?

Immersive Fixes officially supports forge for Minecraft 1.20.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Immersive Fixes – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Immersive Fixes consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install Immersive Fixes with just one click on your server.

Recommended RAM
4 GBfrom €5.2/mo
Minimum 3 GB | per 8 players
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
Apache License 2.0
Server-side
Required

Supported Versions

1.20.1