Modern chunk detector
This mod is a tool that can be used on server that updated their version from a really old version like 1.12 to a more recent one like 1.20. This mod will display a pink overlay on new chunks similar to the chunk border debug option (F3+G).
How to use it
You can toogle the visibility ON/OFF using the keybind (default is O) that can be changed in settings>controls>keybinds
How does it works/Limtations
This mod looks in the ground to find if there is copper or ancient debris and if so marks the chunk as new. This means that if there is an anticheat like anti-x-ray the mod will probably get a ton of false positive.
Screenshots
Contact
If for any reason you want to contact me I'm on Discord: @ayabusa_
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.10
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as modern_chunk_detector-1.1+1.21.10.jar — drop this file into the mods folder
- Download size: 18 KB
- Download link checked 31 Aug 2026 — working
These come from our own check of the pack file, not from the source page.