CurseForge · Minecraft mod
Modefite - Item Definition Backport
Backports the Items Model Definition system introduced in 1.21.4 for resource packs
Quick answer
Which Modefite - Item Definition Backport release should I use?
Modefite - Item Definition Backport modefite-neoforge-1.0.1+1.21.1.jar targets 1.20.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Modefite - Item Definition Backport required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Modefite - Item Definition Backport modefite-neoforge-1.0.1+1.21.1.jar need?
modefite-neoforge-1.0.1+1.21.1.jar. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Modefite - Item Definition Backport without breaking your instance.
Built for Modefite - Item Definition Backport modefite-neoforge-1.0.1+1.21.1.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use modefite-neoforge-1.0.1+1.21.1.jar. It targets 1.20.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside modefite-neoforge-1.0.1+1.21.1.jar. It opens that exact file at the source.
About this project
What does Modefite - Item Definition Backport add?
Modefite - Item Definition Backport

Modefite is a mod that backports the new Items Model Definition system (also called the "Items" system) that was introduced in 1.21.4 to older versions of Minecraft.
With Modefite, you can use your favorite resource packs designed for newer versions for their extra customizability.
FAQ
- Main missing features not implemented yet include the:
special,bundle/selected_item, and themodel tint sourcetypes. - You can see the full list of differences from the official 1.21.4+ system here.
- Some resource packs use core shaders that may be incompatible with your version of the game! You may need to delete the core shaders folder for a pack if you get the error, "Resource reload failed" when enabling.
For Resource Pack Makers
Modefite adds some new properties, fields, and a new resource folder that can be used. More info available here.
Use any custom properties/fields in
assets/<minecraft_or_modid>/modefite_items_overridein your resource pack as vanilla Minecraft 1.21.4+ will render a missing model on any unknown properties/fields.If you haven't seen it already, the documentation on the items model definition system can be seen on the Minecraft wiki.
Any unknown properties or fields will be ignored and won't cause any missing models with Modefite.
See the
latest.logfile for any potential errors you run into!Modefite is not a one-to-one version of the vanilla items model definition system and hopefully there aren't any breaking changes!
Please report any issues, bugs, or feature requests on the GitHub issue tracker!
Future Plans
The main plan is to port the mod to 1.20.1. And possibly as well as for 1.21.2 and 1.21.3. Other main plans are bug fixing and making sure items model definition resource packs work with Modefite.
Another goal is to add the special type to Modefite; although the priority is lower since I don't believe many resource pack makers use this feature much. The types, oversized_in_gui and swap_animation_scale are in similar positions, as well as model tint source types.
Type, budle/selected_item will most likely be added to the 1.21.2/1.21.3 version of Modefite, as the ability to do this with bundles was introduced in those versions.
Eventually I'd like to perhaps add some more custom properties for resource pack creators, and port Modefite and these properties to newer versions so creators can use them.
Project description from CurseForge.
Pick your setup
Modefite - Item Definition Backport by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader build1.20.1
3 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Modefite - Item Definition Backport versions and loaders
modefite-neoforge-1.0.1+1.21.1.jar
21 Jul 2026
modefite-forge-1.0.3+1.20.1.jar
21 Jul 2026
[1.20.1] modefite_item_definitions-1.0.3+1.20.1.jar
modefite_item_definitions-1.0.3+1.20.1.jar
10 Dec 2025
[1.21.2] modefite_item_definitions-1.0.1+1.21.2.jar
modefite_item_definitions-1.0.1+1.21.2.jar
30 Nov 2025
[1.20.1] modefite_item_definitions-1.0.1+1.20.1.jar
modefite_item_definitions-1.0.1+1.20.1.jar
21 Nov 2025
[1.21.1] modefite_item_definitions-1.0.1+1.21.1.jar
modefite_item_definitions-1.0.1+1.21.1.jar
20 Nov 2025
[1.20.1] modefite_item_definitions-1.0.0+1.20.1.jar
modefite_item_definitions-1.0.0+1.20.1.jar
19 Nov 2025
[1.21.1] modefite_item_definitions-1.0.0+1.21.1.jar
modefite_item_definitions-1.0.0+1.21.1.jar
10 Nov 2025
Looking for an older file? The official CurseForge project page is in Resources.