OreOverlay
Client-side Fabric mod for 1.21.11 that predicts nearby ore locations from the world seed and renders colored markers through terrain, hiding them as you mine.
Screenshots
About this Mod
OreOverlay
OreOverlay is a client-side Fabric mod for Minecraft 1.21.11 that helps you find ores by predicting nearby ore locations from a world seed and drawing them as colored in-world overlays.
Search for a specific ore in-game, load the results instantly, and mine with a clear visual guide without changing server behavior or adding any server-side code.
Features
- In-game ore search menu
- Colored ore markers rendered through terrain
- Exact local calculation, no external website required
- Reload overlay data without restarting the game
- Markers disappear as you mine the matching block
- Hidden/mined markers are saved separately
- Client-only Fabric mod
Supported Ores
- Diamond
- Redstone
- Gold
- Iron
- Emerald
- Lapis
- Coal
- Copper
- Ancient Debris
Controls
G- Open ore searchO- Toggle overlayR- Reload ore data
Notes
- This mod is client-side only
- Designed for Minecraft 1.21.11
- Intended for singleplayer, testing, seed analysis, and technical experimentation
- Does not include server-side code or interact with Minecraft servers
- Always respect the rules of any server or community where you play
Available Versions
How to Install OreOverlay on Your Server
Order Server
Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "OreOverlay". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11
Server-side
✗ UnsupportedRecommended RAM
6 GB(min. 4 GB)Frequently Asked Questions
OreOverlay 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 4 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.
Is OreOverlay compatible with fabric?
OreOverlay officially supports fabric for Minecraft 1.21.11. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with OreOverlay – how to optimize performance?
Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if OreOverlay 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 OreOverlay with just one click on your server.