
Unlerp
Make your game run """Smoother""" by changing the game's interpolation!
About this Mod
Make your game """Smoother"""!
Unlerp V3!
Version 3 adds something that may actually be useful for once! You can now configure the amount of ticks over which entity movements are interpolated. This means that for people playing on servers that send more updates than vanilla (you know who you are), gameplay will be much smoother. The mod's default configuration has also been changed to be more convenient for aforementioned situations.
V2
Tired of constantly triggering anticheats? Want your game to be even """smoother"""? Well now you can! Introducing Unlerp 2, the latest and greatest in the unlerping scene. Double the version number, double the amount of options, double the """smoothness""" and double the fun! You can now make the client's tickDelta have a custom interpolation curve as well, letting you experience the bleeding edge of """smoothness" in more places (without setting off anticheats), like your player's model!
Have you ever wanted to play the game without the unsmooth, ugly, and terrible linear interpolation? Well, now you can! This mod lets you change the behaviour of the game's lerp() function, used for almost everything in the game, going as far as to let you change it to any easing curve from easings.net!
You need midnightlib to use this mod. Run /unlerp to open the configuration menu if your GUI goes offscreen.
Be careful playing on servers with this mod, as it could trigger anticheats.
Available Versions
How to Install Unlerp 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 (1.21.5).
Install Mod
Open the mod browser in the dashboard and search for "Unlerp". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.5, 1.21.4, 1.21.3 (+89 more)
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Unlerp 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 (1.21.5). You can switch loaders with one click in the panel.
Is Unlerp compatible with fabric?
Unlerp officially supports fabric for Minecraft 1.21.5, 1.21.4, 1.21.3. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Unlerp – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Unlerp 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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