Filament: Custom Content Adder for Fabric Servers
filament simplifies adding custom content to Fabric-based Minecraft servers. It allows server owners to add new items, blocks, decorations and even mobs using JSON files—no coding required. Configure a block, item, decoration, or armor, and you're ready to go!
Clients can connect to servers using filament without installing any mods, as it relies on a resource pack, item display entities, and packet-based methods.
Decorations and other features have minimal server performance impact due to their packet-based nature.
Use Polymer's auto-hosting capability to host the resource pack—no third-party server required.
TLDR: ItemsAdder/Oraxen alternative for Fabric.
Features
-
Custom Items: Add items with unique behaviors, including:
- Armor
- Cosmetics
- Items running commands
- Bows/Crossbows
-
Custom Blocks: Add your own custom blocks like:
- Trapdoors
- Doors
- Crops
- Budding blocks
-
Custom Decorations: Add furniture and decorations with configurable placement and interactions:
- Benches
- Showcases/Item-Displays
- Container
- Wearable & placeable backpacks
-
Custom Mobs: Add your own mobs with simple goal-based AI - supports custom models too! Create:
- Animals
- Hostile mobs
- Supports custom attributes
- Control spawn chances and biomes to spawn in

Installation
Requires Fabric API and Polymer.
Download filament and drop the example_datapack into the datapacks folder of your server world. filament uses Polymer's resource pack generation and hosting features.
Usage
An example datapack is available in the GitHub repo. Just drop it into your world's datapacks folder.
Check out the documentation!
Mods using filament
These mods & datapacks demonstrate filament's capabilities:
- Hat Club by MJRamon
- Backported Shelves by palm1
- Planked Chests by palm1
- Toms Server Additions: Decorations & Furniture
- Toms Server Additions: Stone!
- Toms Server Additions: Planks!
- Toms Server Additions: Concrete!
Archived:
Credits
This project includes code from FactoryTools by Patbox, specifically the Virtual Destroy stages for decorations.
A copy of the FactoryTools LGPL3 license is included in factorytools-license.txt.
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- Fixes a null-pointer-exception when interacting with composters
- Changes component error messages to warnings
- Fixes templates not applying correctly
- Changes the missing block model from bedrock to vanila error test_block
- Adds support for custom recipes and workstations
- Adds back the ability to create tinted items using a tintable vanillaItem including recipe support using the #dyeable item tag
- Fixes some components not applying correctly
- Fixes virtual block rotations
- Adds pressure_plate block-behaviour
- Fixes custom buttons not breaking when their support block is broken
- Fixes issues with the button behaviour
- Fixes issues with custom mobs
- "waterloggable" and "rotation" block state properties are now optional for decorations using blockResource to change models
- Adds a console for filament logs
- Adds suggestions to text fields for:
- items & tags
- blocks & tags
- models & textures
- sounds & more!
- Fixes various issues with editor
- Changes the theme to a tokyo-night inspired one
- Allows reload of content while the server is running
- The 3D previews are now selectable through a dropdown
- Adds "Unsaved changes" warning
- Fixes a crash with the latest polymer version
- Fixes block models from textures not generating correctly
- Fixes text formatting
- Adds a custom & lenient styled-text formatter with the same minimessage/textplaceholder text styling support
movement field for entities to specify navigation type and move/jump control types and pathfinding malus values# Fixes:
- Templates work again
- The Editor Server starts when the resourcepack is ready or the server starts and shuts down properly when the server stops
- Web Editor UI should work a bit better in some cases
copy_components and copy_tags properties- Fixes an issue preventing loading files from mods
- Fixes decoration block updates
- Allow old blockModelType format
Please make sure to create a backup of your worlds before updating!
- Adds a first version of an "Asset Editor", inspired by Hytale. See
config/filament-editor.jsonfor configuration - Includes a copy of the documentation with the web editor

showcase behaviour not saving properly## It's highly recommended to update to this version is you have been using previous versions above 1.3.15
## It's highly recommended to update to this version is you have been using previous versions above 1.3.15
- Fixes biome tag parsing in biome_modifications
- Attempts to fix decoration rotation in datafixer when alternativeBlockPlacement is enabled for updates from 0.14 to 1.3.x
- Fixes a crash on startup
- Fixes a crash on startup
- Minor fixes
- Minor fixes
- Minor fixes


