Thick Air

Thick Air

A Rewrite of Thin Air by Fuzss for Neoforge 1.21.1

by
2.5K Downloads
neoforgegame-mechanics
Rent Server with this Mod

About this Mod

Thick Air

Rewrite of Thin Air by Fuzss for Neoforge 1.21.1

About

Thick air introduces hardcore air mechanics, specifically by making the player lose oxygen the further they move away from sea level (Y64). Both adventuring in caves and climbing mountains become much more difficult if you don't bring a source of air. Also the nether is now more of a hellscape.

Features

Below Y=0 and above Y=128, and in the nether, you'll slowly lose air.
There is no air whatsoever in the End, so bring a large supply!
You can use potions of free breathing (previously named Water Breathing), respirators or air bladders to protect yourself from losing too much air, but some of these won't work in some environments.

Soul fire, Soul Torches and Soul Campfires can be used to create small pockets of safe air. Bottles of soulfire can restore your air too.

The Safety Lantern can be used to gauge the quality of air around you.

Compatability

This mod has compatability with both Curios API and Create:
Curios API allows you to wear the respirator in your head slot.
Create allows you to use diving suits as a source of air.

Config

The configuration file can be found under

./minecraft/config

Idealy you can also use Mod Menu to modify the config directly in-game

Disclaimer: This Rewrite was made by Leclowndu93150 as part of a Commission

Available Versions

Thick Air 1.1.2release
MC 1.21.1neoforge
December 29, 2025

How to Install Thick Air on Your Server

1

Order Server

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

2

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.1).

3

Install Mod

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

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.1

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Thick Air server crashes on startup – what to do?

Most common cause: wrong neoforge 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 (1.21.1). You can switch loaders with one click in the panel.

Is Thick Air compatible with neoforge?

Thick Air officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Thick Air – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Thick Air 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 Thick Air with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
MIT License
Server-side
Required

Supported Versions

1.21.1