Old Debug Rendering

Brings back the pre 1.21.11 debug renderers.

718 Downloads

fabricutility

Rent Server with this Mod

About this Mod

Old Debug Rendering

This mod brings back the pre 1.21.11 chunk border and hitbox renderers.
Chunk Borders
Mob Hitbox
Fabric API is required.
Install Mod Menu and YACL to access the config menu.

Available Versions

OldDebugRendering v1.0 26.1release

MC 26.1, 26.1.1, 26.1.2fabric

April 1, 2026

OldDebugRendering v1.0 1.21.11release

MC 1.21.11fabric

January 24, 2026

How to Install Old Debug Rendering 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 (26.1.2).

Install Mod

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

Compatibility

Mod Loaders

fabric

Minecraft Versions

26.1.2, 26.1.1, 26.1 (+1 more)

Server-side

✗ Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Old Debug Rendering 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 (26.1.2). You can switch loaders with one click in the panel.

Is Old Debug Rendering compatible with fabric?

Old Debug Rendering officially supports fabric for Minecraft 26.1.2, 26.1.1, 26.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Old Debug Rendering – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Old Debug Rendering 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.