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Alfheim project artwork

Modrinth · Minecraft mod

Alfheim

Alfheim is a lighting engine replacement for Minecraft, optimized for performance and fixing many bugs

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which Alfheim release should I use?

Updated 1 year ago
Latest stable file 1.6
Game version 1.12.2
Loader Forge

Alfheim 1.6 targets 1.12.2 with Forge. Installation on the client is optional. Installation on the dedicated server is optional. All 2 required mods have matching files.

Where it goes

Is Alfheim required on the client, server, or both?

Installation on the client is optional. Installation on the dedicated server is optional.

Client Optional
Dedicated server Optional
Loader for this release Forge
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source marks this as usable on both the client and server.

What else does Alfheim 1.6 need?

1.6. Change the file and its required mods may change too.

All 2 required mods have matching files

Install Red Core, MixinBooter first. We found matching files for this game-version and loader setup.

Red Core Needed by Alfheim 1.6
required
Matching file found Matched file: 0.7.1
MixinBooter Needed by Alfheim 1.6
required
Matching file found Matched file: 11.13

We only count dependency files that match this setup. A file for another loader does not fill the gap.

Before you install it

Add Alfheim without breaking your instance.

Built for Alfheim 1.6. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use 1.6. It targets 1.12.2 with Forge; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    Install Red Core, MixinBooter first. We found matching files for this game-version and loader setup.

  3. 03

    Put it on the correct side

    Installation on the client is optional. Installation on the dedicated server is optional.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside 1.6. It opens that exact file at the source.

About this project

What does Alfheim add?

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Alfheim

Alfheim is a fork (or a rewrite depending on your views on the ship of theseus) of Hesperus which is a fork of Phosphor

What benefit does this have over Phosphor/Hesperus?

Alfheim aims to be compatible in all scenarios, and if for any reasons a something is fundamentally incompatible, a warning will tell you what is happening instead of crashing with hardly any information.

Alfheim also has a lot of optimizations of all sizes over Phosphor/Hesperus it uses slightly less memory overall.

Alfheim also improves client side performance unlike Phosphor/Hesperus, by reducing by lighting related block updates by a factor of 27.
To improve client side performance, Alfheim also limits how much lighting updates are performed each frame.
In addition, Phosphor/Hesperus unnecessarily forces lights to be updates before each frame which Alfheim doesn't.

Alfheim also fixes more vanilla lighting issues than Phosphor/Hesperus, here is a list of all fixes and where they come from:

Fixed in Phosphor/Hesperus:

Fixed in Alfheim:

Why not just PR to Hesperus?

Fair question, the reason is simple, Alfheim compared to Hesperus isn't just a fork to fix bugs, it is my continuation of it.
And as seen in the past, my continuations of mods aren't just modifying some things, they are pretty invasive and basically change everything internally.

It wasn't this way at first, I wanted to PR some stuff to Hesperus but after doing parts of it, it became clear that it had grown bigger than a PR.
So then I decided to do Alfheim, for now it includes optimizations, bug fixes and compatibility fixes, but later down the line I have more plans.


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My commissions are currently open and I would be happy to create a custom mod to fit your needs as long as you provide assets.

Commissions

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Project description from Modrinth.

Pick your setup

Alfheim by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

1 available setups

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

Alfheim versions and loaders

10 of 10 releases match

Looking for an older file? The official Modrinth project page is in Resources.