Polydex2REI
An REI attachment, used for bridging Polymer to REI
About this Mod
Polydex2REI
Bridging the Gap Between Polymer and REI — Let Your Recipes Be Seen
📦 What is Polydex2REI?
Polydex2REI is a compatibility addon that connects Polymer and REI (Roughly Enough Items), enabling full support for virtual items and custom recipes defined by Polydex.
By default, REI cannot recognize Polymer’s server-side virtual items, leading to missing entries in recipe viewers and item lookups. Polydex2REI fixes that.
🔧 Features
- 📘 Supports custom recipes registered via the Polydex API
- 🔄 Synchronizes item lookup actions — clicking or keypress correctly opens the recipe page
- 💡 Works with both server-side and client-side virtual items
- 🌐 Requires both sides installed to function properly
❓ Why Use It?
If you're a modpack creator or developer using Polymer to register virtual items (e.g. recipe placeholders, guide items, UI buttons), you’ve likely run into the issue: REI can’t find them. This addon solves that cleanly — no extra setup, just plug and play.
🧩 Requirements
- Polymer
- REI
- Polydex
- Packet-Fixer
- Must be installed on both client and server
Available Versions
How to Install Polydex2REI 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 (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Polydex2REI". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11, 1.21.10, 1.21.8 (+1 more)
Server-side
~ OptionalRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Polydex2REI 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 (1.21.11). You can switch loaders with one click in the panel.
Is Polydex2REI compatible with fabric?
Polydex2REI officially supports fabric for Minecraft 1.21.11, 1.21.10, 1.21.8. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Polydex2REI – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Polydex2REI 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 Polydex2REI with just one click on your server.