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Render Detector

A diagnostic tool that scans installed mods and reports where legacy rendering patterns appear. It is useful since Minecraft has the option to use Vulkan since version 26.2 Snapshot 3.

Fabric
Loaders
Fabric
Downloads on Modrinth
366
Followers on Modrinth
4
version
1
Updated
February 23, 2026Feb 23
Published
in 2026
Main GUI — The GUI shows Vulkan compatibility percentages and how many OpenGL references there are in each mod. Mods shown here are examples. · swipe

At a glance

Runs on Fabric
For Minecraft 1.20.1
Client only — no need to install it on the server
Latest version — 0.1.0 from February 23, 2026
License Apache-2.0 — free
Where it's needed
In gamerequiredOn servernot needed

Install in the game only; not needed on the server

Game versions1.20.1

Render Detector

A useful diagnostic and analysis tool.

It helps modders understand where their code relies on older GL features so they can make informed decisions about maintenance or refactoring.

Fabric Version

What Render Detector does:

  • Scans and inspects every mod
  • Displays results in a clean GUI for quick visual checks
  • Can generate a text report for further review

    • The text report can be shown in 3 file formats: txt, json and csv
    • You can copy an extremely short 1 line report to clipboard!

How to use?
Simply use this mod with other mods you want to test, and in Minecraft, type the command /renderdetector, and a sleek GUI will open will all of the information you need.

Why does this matter?
Minecraft's rendering system has evolved over time, and many mods still use an older rendering methods in certain parts of code. Render Detector helps modders understand where legacy rendering code appears, and locate these certain parts of code.

Heads up: RD isn’t perfect. Some mods won’t scan correctly, some results may be off, and certain things can’t be detected yet. It’s a helper tool and isn't perfect.

How detection works

  • RD does not run or load other mods’ code. It only:
  • Reads mod JAR files from the loaded mod list
  • Scans different files for different patterns

Results are based on static pattern matching inside files, not execution or network. Data is always kept local.


This tool is meant for everyone — modders, pack creators, and curious players — which is why Render Detector is licensed under Apache 2.0, keeping it open, flexible, and easy to include in any project.

FAQ

How to install Render Detector?

Install Fabric for your Minecraft version, download Render Detector for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does Render Detector support?

Render Detector has builds for Minecraft 1.20.1.

Is Render Detector needed on the server?

Client only — no need to install it on the server

License and source
Apache License 2.0free to use and share with credit to the author
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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