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Lost Cities Modern Tweaks (Lights Off Edition)

by morriswmz

Lost Cities Modern Tweaks (Lights Off Edition) is a datapack that removes most light sources from the Lost Cities world generation, making the cities darker and more challenging.

FabricForgeNeoForgeServer required, client optionalMIT License1.20.1 – 26.2

What it does

The datapack is built on the Modern Tweaks content of the same family and keeps most of it, except that most light sources are taken out. Street lamps are removed completely, lanterns in building parts are gone, and lights on railway systems are swapped for blocks that do not emit light. Because it touches parts of the base mod, such as the places that use torches, it is intended to suit post-apocalyptic settings and players who want a darker city.

The datapack needs The Lost Cities installed, since it only overrides specific datapack files of that mod, including the world style file for everywhere and the city style file for borders. Installing it together with the Modern Tweaks datapack at the same time is not supported. Environment wise, the server requires it, while clients can join without installing it. The mod is released under the MIT License and is not open source, and it has been published for 1.20.1, 1.21.1, 1.21.11, 26.1.2 and 26.2.

Files exist for Fabric, Forge and NeoForge, with the latest builds for 26.2. The datapack was tested with several vanilla Lost Cities profiles, but it could not be tested in heavily modded environments that alter world generation. Problems caused by it should be reported to its author rather than to the Lost Cities mod.

Key features

  1. Most light sources removed

    Torches and other light sources are taken out of the city generation, leaving most areas unlit.

  2. Street lamps removed

    Street lamps are not generated, so roads and sidewalks have no lighting fixtures.

  3. Lights replaced on railways

    Light-emitting blocks on railway systems are replaced with blocks that do not emit light.

  4. Shared content with Modern Tweaks

    The rest of the content matches the Modern Tweaks datapack, with its tweaks moved under the lcmt namespace.

Compatibility

Latest build for each game version and loader.

26.25.0.1Not available5.0.1
26.1.2Not availableNot available4.0.1
1.21.11Not availableNot available3.1.1
1.21.1Not availableNot available2.1.1
1.20.1Not available1.1.2Not available
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

The Lost CitiesAllows the player to play in an old abandoned city instead of the normal overworld
Required

How it compares

Full comparison

Big Lost City is a Fabric, Forge and NeoForge mod for 1.20.1 – 26.1.2 that runs on the client and server and is All rights reserved, while this datapack needs only the server side and is MIT licensed. ChaosZPack [Lost Cities] Abandoned / Zombie Apocalypse is a Forge mod for 1.20.1 only, with client and server environment and All rights reserved licensing. Luki's Ancient Cities is a Fabric, Forge, NeoForge and Quilt mod for 1.20.4 – 1.21.11, server required and client optional, All rights reserved.

ModLoadersGame versionsEnvironmentUpdated
Lost Cities Modern Tweaks (Lights Off Edition)Fabric, Forge and NeoForge1.20.1 – 26.2Server required, client optional2026-09-13
Big Lost CityFabric, Forge and NeoForge1.20.1 – 26.1.2Client and server2026-05-18
ChaosZPack [Lost Cities] Abandoned / Zombie ApocalypseForge1.20.1Client and server2026-03-15
Luki's Ancient CitiesFabric, Forge, NeoForge and Quilt1.20.4 – 1.21.11Server required, client optional2025-11-02

Questions

Does Lost Cities Modern Tweaks (Lights Off Edition) need The Lost Cities?

Yes. The Lost Cities is a required dependency, because the datapack only overrides files from that mod.

Does the server need this datapack installed?

Yes. The server requires it, while the client is optional, so players can join without installing anything.

Can it be installed together with the Modern Tweaks datapack?

No. The Modern Tweaks datapack must not be installed at the same time, because the two are meant to be used separately.

In the catalog

Lost Cities Modern Tweaks (Lights Off Edition) is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 13,894 mods support Minecraft 26.2.

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What the author says

This datapack (packaged as a mod) is a variant of the Lost Cities Modern Tweaks datapack. It shares the same content except that most light sources are removed. It provides a more challenging experience and better fits into some post apocalyptic settings. ⚠ You need to have The Lost Cities installed to use this…
morriswmz, on the Modrinth page

Official listing

Owner
morriswmz
Published
2024-11-03
Updated on Modrinth
2026-09-13
Facts verified
2026-10-15

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