LC²H | Lost Cities: Multithreaded

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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.

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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.

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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

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City Safe Structure System

• Prevents structures inside cities
• Removes floating vegetation
• Cleans worldgen artifacts

Result: clean city skylines.

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Config UI

Commands removed. Config is now in-game UI.

Path: Mods → LC2H → Config

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Why V3 Is Fast

• Pull-based main-thread apply
• No queue flooding
• Stable TPS
• Predictable load times

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Translation Layer

Makes Lost Cities thread-safe by isolating unsafe state.

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Credits

McJty – creator of The Lost Cities.

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LC²H – Version 3.2.2
Created by Admany – BlackRift Studios
January 28, 2026