Phosphor-Legacy
Port of Phosphor to Legacy-Fabric
About this Mod
Phosphor-Legacy
Phosphor-Legacy is port of JellySquid's Phosphor mod to Legacy-Fabric.
Currently this is just the original 1.12.2 forge code changed in order to work with fabric.
Phosphor
Phosphor is a free and open-source Minecraft mod aiming to save your CPU cycles and improve performance by optimizing one of Minecraft's most inefficient areas: the lighting engine.
It works on both the client and server, and can be installed on servers without requiring clients to also have the mod.
Phosphor is designed to be as minimal as possible in the changes it makes, and as such, does not modify the light model or interfaces of vanilla Minecraft. Because of this, Phosphor should be compatible
with many Minecraft mods (so long as they do not make drastic changes to how the lighting engine works.) If you've ran into a compatibility problem, please open an issue!
Available Versions
How to Install Phosphor-Legacy on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.12.2).
Install Mod
Open the mod browser in the dashboard and search for "Phosphor-Legacy". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.12.2, 1.8.9
Server-side
~ OptionalRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Phosphor-Legacy server crashes on startup – what to do?
Most common cause: wrong fabric 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 (1.12.2). You can switch loaders with one click in the panel.
Is Phosphor-Legacy compatible with fabric and legacy-fabric?
Phosphor-Legacy officially supports fabric, legacy-fabric for Minecraft 1.12.2, 1.8.9. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Phosphor-Legacy – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Phosphor-Legacy 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.
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Rent Modded Server
Install Phosphor-Legacy with just one click on your server.