![LC²H [Lost Cities: Multithreaded]](https://cdn.modrinth.com/data/Mcvy3mxt/95f29fd886e7a91e2adf6131e2d3c366926a505c_96.webp)
LC²H [Lost Cities: Multithreaded]
LC2H V3 turbocharges The Lost Cities to massive cities, lightning-fast, silky smooth gameplay. Fully C²ME compatible. I'm proud of this, and hope everyone will enjoy using it :]
About this Mod
LC²H | Lost Cities: Multithreaded
Compatibility Notice
Officially supported and tested:
- C2ME
- Sinytra Connector (fixed sync + loader edge cases in V3.2.0)
- Distant Horizons (boot crash fix + pull-based LOD sampling in V3.2.0)
These mods are validated with LC²H V3 and are marked as supported.
What Is LC²H
LC²H is a performance and stability rework layer for The Lost Cities.
V3 moves the full generator pipeline off the Minecraft main thread.
City generation is fully async, parallel, and safely applied.
V3.0.0 – An Engineering Marvel
A ground-up rebuild with:
- Job-based generator API
- Async scheduler
- Parallel worker pools
- Thread-safe translation layer
- Multi-tier caching
- Optional GPU acceleration
City Safe Structure System
- Prevents structures inside cities
- Removes floating vegetation
- Cleans worldgen artifacts
Result: clean city skylines.
Config UI
Commands removed. Config is now in-game UI.
Path: Mods → LC2H → Config
Why V3 Is Fast
- Pull-based main-thread apply
- No queue flooding
- Stable TPS
- Predictable load times
Translation Layer
Makes Lost Cities thread-safe by isolating unsafe state.
Credits
McJty – creator of The Lost Cities.
LC²H – Version 3.2.2
Created by Admany – BlackRift Studios
January 28, 2026
Available Versions
How to Install LC²H [Lost Cities: Multithreaded] on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set forge Loader
In the panel under "Egg", select the forge loader and matching Minecraft version (1.20.6).
Install Mod
Open the mod browser in the dashboard and search for "LC²H [Lost Cities: Multithreaded]". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.20.6, 1.20.5, 1.20.4 (+3 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
LC²H [Lost Cities: Multithreaded] server crashes on startup – what to do?
Most common cause: wrong forge 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 (1.20.6). You can switch loaders with one click in the panel.
Is LC²H [Lost Cities: Multithreaded] compatible with forge?
LC²H [Lost Cities: Multithreaded] officially supports forge for Minecraft 1.20.6, 1.20.5, 1.20.4. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with LC²H [Lost Cities: Multithreaded] – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if LC²H [Lost Cities: Multithreaded] 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 LC²H [Lost Cities: Multithreaded] with just one click on your server.