Skip to content

Nylon

Library for creating serverside content using Animated-Java for custom models and animations.

Fabric
Loaders
Fabric
Downloads on Modrinth
3.3K
Followers on Modrinth
36
versions
16
Updated
June 18, 2026Jun 18
Published
in 2023
Example mob — Example mob included in the test mod · swipe

At a glance

Runs on Fabric
For Minecraft 1.20.2–1.21.1, 1.21.4–26.2
Server only — players don't need to install it
Latest version — 0.13.6 from June 18, 2026
License LGPL-3.0-only — free
Where it's needed
In gamenot neededOn serverrequired

Install on the server only; players don't need it

Game versions1.20.2–1.21.1, 1.21.4–26.2

Nylon

It's a library for creating serverside content using custom models and animations, without requiring client mods.\

Nylon is a bridge between models created with Animated Java and serverside content (like entities and blocks) written using Polymer, allowing you to combine fancy custom models, textures and animations made in Blockbench with completely custom block / mob logic.

Setup

repositories {
    maven { url "https://api.modrinth.com/maven" }
}

dependencies {
    modImplementation "maven.modrinth:nylon:[TAG]"
}

Features

  • Smooth and accurate animations, using mounted display entities with configurable rotation interpolation instead of armor stands to ensure smooth rotations and that all the model pieces positions are in sync.
  • Minimal impact on server performance. Nylon is highly optimized and models are updated asynchronously. Nylon also makes full use of vanilla's packet flush suspending to reduce network load and ping spikes.
  • Support for most Animated Java features:

    • Variants: Ability to instantly switch between different models and textures.
    • Locators: Can be used to listen for pose updates on a specific part of the model. These listeners can be used to add extra animated objects to the model, such as particles and other entities.
    • Animation frame effects: Certain effects that can be conditionally applied on a specific frame of an animation. For example, running a command, playing a sound or changing the variant.
    • Many others like bone blacklists, animation loop modes, start and loop delays, etc.

  • Out of the box support for many vanilla mob features:

    • Vanilla accurate hitboxes visible in F3+B, using interactions.
    • The ability to ride on top of the mob, without visually lagging behind.
    • Working invisibility, glowing, fire animation and most particles (like potion effects, crits and death).
    • Correctly rendering leashes, death animations and smooth clientside collisions with players.
    • Dynamic hitboxes and dynamic mob scale (an example use case of this is baby mobs).
    • The model won't tick if the entity wasn't ticked, reducing server and network load.
    • Uses the display entities culling boxes to reduce client lag.

Commands

  • `/nylon model create id|filepath ` - Spawns a model ingame based on mob identifier or a file path (from server root folder) to the model json file. These models are not saved and are mostly intended for testing.
  • `/nylon model animation|variant|scale - Modifies the model of any entity selected in` that has a custom model. Allows you to temporarily change the scale of the model, update the variant and play / pause / stop animations. This is also mostly intended for testing and playing with the models.

FAQ

How to install Nylon?

Install Fabric for your Minecraft version, download Nylon for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does Nylon support?

Nylon has builds for Minecraft 1.20.2–1.21.1, 1.21.4–26.2.

Is Nylon needed on the server?

Server only — players don't need to install it

License and source
GNU Lesser General Public License v3.0 onlyfree to use and share; changes to the mod itself must be published under the same license
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

The site uses cookies: the necessary ones for sign-in and the theme, plus the Yandex Metrica and LiveInternet visit counters — they show us how the site is used. We have no advertising cookies. More