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OPaC BlueMap – NeoForge Remap
This mod displays land claims from the Open Parties and Claims (OPaC) mod directly on your BlueMap web maps in real-time.
An Unofficial Forge/NeoForge Port of OpenPaC BlueMap Remapped,
which itself is a fork of OPaC BlueMap.
✅ Usage
- Install:
- Open Parties and Claims
- BlueMap
- This mod
- Start your server – claims will automatically appear on your BlueMap.
🆕 Features
- Real-time updates – no more 10-minute delays
- NeoForge 1.21.1 support
- Bug fixes: no more ghost chunks, memory leaks, or stale data
- Performance: incremental per-player updates, efficient caching, UUID-based markers
📜 Credits
⚠️ Notes & License
- Licensed under the MIT License – usage and reuploads are permitted.
- Disclaimer: This mod hasn’t been thoroughly tested.
- Maintenance is not guaranteed – this was mostly made for fun, and I’m not really a modder.
How to Install OpenPaC BlueMap - Refreshed (Mod)
OpenPaC BlueMap - Refreshed by alexiokay is verified for Neoforge across Minecraft versions 1.21.1 (latest release: 1.2.1, file size: 53 KB). Follow the steps below to install it safely from ModCraft.tv:
- Click the Download button above and select your Minecraft version (1.21.1) and platform (Neoforge).
- Make sure you have the compatible loader or environment installed for Neoforge.
- Move the downloaded OpenPaC BlueMap - Refreshed file into your Minecraft
.minecraft/modsfolder and launch the game.
[1.2.1] OpenPaC BlueMap - Refreshed 1.2.1
by alexiokay on Sep 13, 2025
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# OpenPaC BlueMap – NeoForge Remap
This mod integrates **Open Parties and Claims (OpenPaC)** with **BlueMap** to display land claims on your web maps in **real-time**.
## 🚀 Major Improvements from Original
This fork includes significant enhancements over the original Fabric version:
### ⚡ Real-Time Updates
### 🔧 Platform Migration
### 🛡️ Critical Bug Fixes
### 🎯 Performance Optimizations
This mod integrates **Open Parties and Claims (OpenPaC)** with **BlueMap** to display land claims on your web maps in **real-time**.
## 🚀 Major Improvements from Original
This fork includes significant enhancements over the original Fabric version:
### ⚡ Real-Time Updates
- Event-driven syncing using
OpenPaC's IClaimsManagerListenerAPI - Immediate claim updates – no more waiting 10 minutes for changes to appear
- Live chunk change detection with:
onChunkChange
### 🔧 Platform Migration
- Migrated to **NeoForge 1.21.1** (from Fabric)
- Updated dependencies for the latest Minecraft version
- Server-prefixed JAR naming for easy identification
### 🛡️ Critical Bug Fixes
- Ghost chunk elimination** – fixed issue where unclaimed chunks remained visible on BlueMap
- Cache-first architecture** – prevents stale data from OpenPaC API
- Memory leak prevention** – eliminated
OutOfMemoryErrorcrashes - Thread-safe operations** – using
ConcurrentHashMapand synchronized collections
### 🎯 Performance Optimizations
- UUID-based marker identification** for consistent tracking
- Incremental per-player updates** instead of full map rebuilds
- Efficient chunk caching system**
- Reduced update intervals** (5-minute fallback vs. 10-minute)
