
Custom Map Resetter
map resetter in the spirit of Atum, made with the CTM (Complete the Monument) community in mind
Screenshots



About this Mod
A mod that copies and reloads a specific world file for reset efficiency in custom map speedrunning.
The version-by-version changelogs are in the original github releases, or the commit history if you're that kind of person.
how to use (written by Qwuiblington)
shift + click the diamond boots icon on the main menu next to singleplayer to select a world
click on the diamond boots again to start resetting that world
once you're resetting, the save & quit to title button will immediately create a new copy of the world & put you in it
to exit, you have to go into options, & click the "stop resets & quit" button on the bottom left corner of the screen
(you may also turn off autoresetting, to only make use of the world copying & deleting functionality)
after this, you can shift + click on the diamond boots again & click "delete session worlds" to delete every copy made by the mod
if you close the game, it won't save which worlds were created by the mod, so you'll have to delete the saves manually or with an external script
attempt counters are kept track of by world folder name, & stored in [instance folder]\config\custom-map-attempts.txt
there is also a read-only file containing only the current map's reset count, for obs file reading, in [instance folder]\attempt.txt
Available Versions
How to Install Custom Map Resetter 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 (1.21.4).
Install Mod
Open the mod browser in the dashboard and search for "Custom Map Resetter". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.4, 1.21.3, 1.21.2 (+67 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Custom Map Resetter 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 (1.21.4). You can switch loaders with one click in the panel.
Is Custom Map Resetter compatible with fabric and legacy-fabric and quilt?
Custom Map Resetter officially supports fabric, legacy-fabric, quilt for Minecraft 1.21.4, 1.21.3, 1.21.2. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Custom Map Resetter – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Custom Map Resetter 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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