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LC²H [Lost Cities: Multithreaded]

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 :]

22 698 downloads 7 followers

LC²H | Lost Cities: Multithreaded

Crowdin

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

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Version Minecraft Loader Download

LC²H [Lost Cities: Multithreaded] 3.5.0

3.5.0

1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6
forge
Download

LC²H [Lost Cities: Multithreaded] 3.4.0

3.4.0

1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6
forge
Download

LC²H [Lost Cities: Multithreaded] 3.3.0

3.3.0

1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6
forge
Download

LC²H [Lost Cities: Multithreaded] 3.2.7

3.2.7

1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6
forge
Download

LC²H [Lost Cities: Multithreaded] 3.2.4

3.2.4

1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6
forge
Download

LC²H [Lost Cities: Multithreaded] 3.2.3

3.2.3

1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6
forge
Download