About this Mod
Client masks like WorldEdit but client.
use /cmask to set/clear a mask
the goal for syntax is to be as similiar to WorldEdit/FAWE as possible. WorldEdit mask wiki
Currently supports <, >, and comma separated blocks. (does not YET support &, ~, !, quotes (""), block ID's, or block states.)
examples:
/cmask stone
will only effect stone blocks
/cmask >stone
will only effect blocks above stone
/cmask <stone
will only effect blocks below stone
/cmask grass_block,>stone
will only effect grass blocks above stone
Available Versions
How to Install CMask 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 (1.21.8).
Install Mod
Open the mod browser in the dashboard and search for "CMask". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.8
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
CMask 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 (1.21.8). You can switch loaders with one click in the panel.
Is CMask compatible with fabric?
CMask officially supports fabric for Minecraft 1.21.8. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with CMask – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if CMask 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.
Rent Modded Server
Install CMask with just one click on your server.