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    2,046,932 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 24 Oct 2026.636,163 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 24 Oct 2026.269,480 projects gradedProjects with a letter from A to F. Counted on 24 Oct 2026.
    How it worksMalware we foundAPIAboutPrivacyTermsContact

    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    LC²H [Lost Cities: Multithreaded]

    Mod

    Build huge cities faster with smoother Lost Cities gameplay.

    B87/ 100
    • OverviewB
    • SecurityPassed
    • PrivacySends data
    • AINone found
    • CompatibilityUp to 1.21.1
    • ModpacksIn 458
    • ReleasesLatest 2 Oct

    Download

    lc2h-omni-4.2.5-LTS.jar

    Released 2 Oct 2026 · 3.8 MB

    Passed: our checks found nothing harmful in this file.

    Download

    Required to run

    • Quantified APIAMinecraft 1.21.1 · NeoForge (release 2.2.4)
    • The Lost CitiesAMinecraft 1.21.1 · NeoForge (release 1.21-8.4.6)
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade B

    How grades work

    Strengths

    • Widely used

    Points lost

    • No public issue tracker−3 points
    • Some modpacks removed it−2 points
    • Releases replaced within 3 days to fix a problem−2 points
    • Releases in only 7 of the last 24 months−1 point
    • First release only 10 months ago−1 point
    All 11 criteria

    • Maintenance

      1 point lost26 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.3 weeks ago (2 Oct 2026) 12 / 12
      Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.1.21.1 on Forge and NeoForge. 15% or more of the popular mods updated in the last 6 months also have files for 1.21.1. Latest Minecraft: 26.3. 9 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 7 of the last 24 months 5 / 6

    • Stability

      4 points lost18 / 22
      Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.43 of the 296 modpacks with two or more versions removed it in a later one (15%) See the 43 modpacks8 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.5 of its 25 releases in 2 years needed a quick fix (20%) See the 5 releases5 / 7
      Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5

    • Transparency

      3 points lost7 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · Admany/LC2H 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.No link to report problems 0 / 3

    • Popularity

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.2,173,634 4 / 4

    • Track record

      1 point lost7 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.10 months, 23 releases 7 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in both latest files for recent Minecraft versions. See Security
    Total87 / 100

    61.6 of the 71 points that apply = 87 out of 100. The points above are rounded to whole numbers.

    Images

    • LC2H_Blender_1.png

    About

    LC²H is a performance and stability layer for The Lost Cities, designed to make city-heavy world generation run more efficiently without replacing the original generator’s identity. It reduces repeated work with faster generation algorithms, reusable bounded caches and parallel planning, while controlling how results are applied to the world to avoid unsafe concurrent changes. Its terrain blending uses surrounding regional information and Minecraft’s native terrain generation, helping city edges transition into hills and mountains without abrupt walls or cutoffs. Cross-chunk planning helps roads, highways, tunnels and large buildings connect consistently, while deferred tree placement protects trees that span chunk borders from being cut apart or left with floating foliage. The mod also cleans up vegetation such as vines and glow lichen, and provides an in-game configuration interface for choosing between the newer Hierarchical Grid and Legacy street-planning modes. Optional GPU computation is available through Quantified API when a supported hardware path is suitable, with CPU fallbacks otherwise; the project also includes diagnostics and an integrated benchmark for examining generation performance.

    Written from CurseForge . How we write it

    In-game changes

    Changes the game's code in 6 areas: World generationChanges 11 game code files in this area: terrain, biomes and structures made when new land is created., Server and world logicChanges 5 game code files in this area: the world, commands, scoreboards, saved data and game rules., Mobs and their behaviorChanges 2 game code files in this area: mobs, animals, villagers, projectiles and how they move and act., Chunk loading and storageChanges 1 game code file in this area: how the game loads, tracks, saves and unloads chunks., User interfaceChanges 1 game code file in this area: menus, screens, tooltips, the chat window and the in-game overlay. and Blocks and fluidsChanges 1 game code file in this area: how blocks, fluids and redstone work..

    Adds 2 sounds: Button Click and Countdown.

    Counted from the names and data files in the mod, so the list may not be complete.

    Keeps all of vanilla Minecraft's textures, models and sounds.

    Often used with it

    See all 30
    The Lost CitiesAMrCrayfish's Furniture Mod: RefurbishedAImmersive Weathering [FORGE]C[TaCZ] Timeless and Classics ZeroAMineTrapsC

    Details

    Creator
    BlackRift Studios
    License
    BRSSLA V1.5
    Downloads
    2.2M
    Created
    12 Aug 2025
    Official pages
    Modrinth , CurseForge
    Links
    Source code , Discord

    Security

    No harmful code found

    We checked its files and read their code, without running it.

    What it can do on your computer

    Can update itself
    It can add or replace files in your mods folder, for example to update itself. Only in its files for NeoForge 1.20.1 to 1.21.1.
    Connects to the internet
    It has code that can go online, for example to check for updates, load skins or send crash reports. It contacts 1 web address. See Privacy
    Creates settings files
    The mod keeps its settings in the config folder of your game, where you can change or delete them. 4 files in your config folder.

    Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.

    How we checked · Both latest files checked, last on 16 Oct 2026
    • FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.
      2 latest files: the newest file for each Minecraft version and loader. Both are for recent versions. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
    • Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.
      Read without running it
    • Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.
      Nothing declared about your system outside the game.
    • Looked for, not foundWe looked for these in the file and did not find them.
      Folders outside the game, other programs, the webcam or microphone, an AI service.

    Privacy

    Sends unknown data

    Sent to admany.dev.

    We found this in its code, read without running it.

    Why we show this: a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.

    How we checked · Both files read
    • Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.
      The code of both files, for recent Minecraft versions. See each file in Releases
    • admany.dev
      Uploads a benchmark result to the mod's service.Explained by AI (may be wrong)Explained by an AI from the code. May be wrong.
      Unknown data
    • Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.
      Nothing declared about crash reports, usage data or advertisements.

    AI

    No sign that AI was used to make it

    We looked for AI tools in its texts, files, images, sounds and code history and found none.

    No sign of AI in the game

    We found no AI service, AI library or AI model file in its code.

    Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.

    How we checked · 7 places read
    • Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.
      No AI content or AI features declared.
    • Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.
      Nothing found
    • Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.
      Nothing found
      40 changelogs read
    • Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.
      Nothing found
    • Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.
      Nothing found
      1 image read
    • Sounds in its filesThe tags of the sound files in the files you download, where some AI music tools write their name.
      Nothing found
      2 sounds read
    • Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.
      No AI service, AI library or AI model file
      1,292 code files read

    Compatibility

    See all 23 files
    NeoForge
    Forge
    1.201.2126.126.3

    Point at or tap a version to see its loaders.

    Runs onWhere to install it: in your game, on the server, or both. As the author says on Modrinth.Needed in your game and on the server, or you cannot join.
    RequiresProjects you must also install for it to work. From the author's lists for its files for recent Minecraft versions, or from its project page.
    Quantified APIon NeoForgeAThe Lost Citieson NeoForgeA
    OptionalProjects it can work with but does not need. The author lists them.Nothing
    IncludesProjects packed inside its files.Nothing
    Speed of updatesHow fast it gets a file for new Minecraft versions, on average, compared with similar projects. Not part of the grade.It has no file for Minecraft versions newer than 1.21.1. Many recently updated mods still support 1.21.1.

    Related projects

    Projects that need LC²H [Lost Cities: Multithreaded] to work.

    ProjectTypeDownloadsGrade
    Afterfall CompatibilityDMod140 downloads

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    80400
    Oct 2024: 0 modpacksNov 2024: 0 modpacksDec 2024: 0 modpacksJan 2025: 0 modpacksFeb 2025: 0 modpacksMar 2025: 0 modpacksApr 2025: 0 modpacksMay 2025: 0 modpacksJun 2025: 0 modpacksJul 2025: 0 modpacksAug 2025: 22 modpacksSep 2025: 25 modpacksOct 2025: 32 modpacksNov 2025: 42 modpacksDec 2025: 46 modpacksJan 2026: 42 modpacksFeb 2026: 48 modpacksMar 2026: 55 modpacksApr 2026: 42 modpacksMay 2026: 57 modpacksJun 2026: 58 modpacksJul 2026: 65 modpacksAug 2026: 50 modpacksSep 2026: 57 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 20240
    Nov 20240
    Dec 20240
    Jan 20250
    Feb 20250
    Mar 20250
    Apr 20250
    May 20250
    Jun 20250
    Jul 20250
    Aug 202522
    Sep 202525
    Oct 202532
    Nov 202542
    Dec 202546
    Jan 202642
    Feb 202648
    Mar 202655
    Apr 202642
    May 202657
    Jun 202658
    Jul 202665
    Aug 202650
    Sep 202657

    More modpacks put it in their new versions than a year ago: 55 a month now, 8 a year agoThe average of the last 6 months, compared with the same 6 months a year before. We say it only when the change is large..

    458 modpacks include LC²H [Lost Cities: Multithreaded] in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    DeceasedCraft - Urban Zombie Apocalypse9.8M downloadslast version with it 29 Dec 2025Cursed Walking - A Modern Zombie Apocalypse8.7M downloadslast version with it 8 Aug 2026ZOMBIEMANIA - A Modern Zombie Apocalypse1M downloadslast version with it 13 Oct 2026ZombieCraft: Zombie Apocalypse745K downloadslast version with it 6 Apr 2026Beyond Cosmo525K downloadslast version with it 18 Oct 2026ChaosZProject - A Modern Zombie Apocalypse [VR for WIP v.3.0.0]213K downloadslast version with it 15 Sep 2025Izakji's Zombie Apocalypse II142K downloadslast version with it 15 Dec 2025Agmundr - Zombie Apocalypse122K downloadslast version with it 11 Jul 2026Cursed Walking - Lite Edition112K downloadslast version with it 18 Oct 2026Zombie REAP Plague Against Your World.107K downloadslast version with it 31 Aug 2026
    1 to 10 of 30123

    Often in the same modpacks

    Mods that modpacks often add together with LC²H [Lost Cities: Multithreaded]. Share: how many of the modpacks with LC²H [Lost Cities: Multithreaded] also have that mod.

    ProjectTypeShareGrade
    The Lost CitiesAModin 99% of the modpacks with LC²H [Lost Cities: Multithreaded]MrCrayfish's Furniture Mod: RefurbishedAModin 90% of the modpacks with LC²H [Lost Cities: Multithreaded]Immersive Weathering [FORGE]CModin 90% of the modpacks with LC²H [Lost Cities: Multithreaded][TaCZ] Timeless and Classics ZeroAModin 89% of the modpacks with LC²H [Lost Cities: Multithreaded]MineTrapsCModin 87% of the modpacks with LC²H [Lost Cities: Multithreaded]Keerdm's Zombie Apocalypse EssentialsCModin 86% of the modpacks with LC²H [Lost Cities: Multithreaded]Horror Element ModBModin 85% of the modpacks with LC²H [Lost Cities: Multithreaded]Doomsday DecorationCModin 85% of the modpacks with LC²H [Lost Cities: Multithreaded]Survival InstinctCModin 83% of the modpacks with LC²H [Lost Cities: Multithreaded]Create DecoBModin 83% of the modpacks with LC²H [Lost Cities: Multithreaded]
    1 to 10 of 30123

    Latest files

    The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.

    MinecraftLoaderVersionSecuritySendsRequires
    1.20.1 to 1.21.1·NeoForge, Forge4.2.5-LTS4.2.5-LTS · lc2h-omni-4.2.5-LTS.jarSends: Unknown dataRequires:Quantified API, The Lost CitiesQuantified API, The Lost CitiesPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1 to 1.20.6·Forge3.5.03.5.0 · lc2h-3.5.0.jarSends: Unknown dataRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    23 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.20.1 to 1.21.11.20.1 to 1.21.1The latest file for its Minecraft version and loader·Forge, NeoForge4.2.5-LTS4.2.5-LTS · lc2h-omni-4.2.5-LTS.jar·2 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 3.8 MB
    1.20.1 to 1.21.11.20.1 to 1.21.1·Forge, NeoForge4.2.4-LTS4.2.4-LTS · lc2h-omni-4.2.4-LTS.jar·20 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 3.8 MB
    1.20.1 to 1.21.11.20.1 to 1.21.1·Forge, NeoForge4.2.3-LTS4.2.3-LTS · lc2h-omni-4.2.3-LTS.jar·15 Sep 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 3.8 MB
    1.20.1 to 1.21.11.20.1 to 1.21.1·Forge, NeoForge4.2.2-LTS4.2.2-LTS · lc2h-omni-4.2.2-LTS.jar·8 Sep 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 3.8 MB
    1.20.1 to 1.21.11.20.1 to 1.21.1·Forge, NeoForge4.2.1-LTS4.2.1-LTS · lc2h-omni-4.2.1-LTS.jar·7 Sep 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 3.8 MB
    1.20.1 to 1.21.11.20.1 to 1.21.1·Forge, NeoForge4.2.0-LTS4.2.0-LTS · lc2h-omni-4.2.0-LTS.jar·7 Sep 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 3.8 MB
    1.20.1·Forge4.1.2-RELEASE4.1.2-RELEASE · lc2h-4.1.2-RELEASE.jar·1 Sep 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 2.0 MB
    1.20.1·Forge4.1.1-BETA4.1.1-BETA · lc2h-4.1.1-BETA.jarBeta·30 Aug 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 2.0 MB
    1.20.1·Forge4.1.0-BETA4.1.0-BETA · lc2h-4.1.0-BETA.jarBeta·29 Aug 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 2.0 MB
    1.20.1·Forge4.0.0-BETA4.0.0-BETA · lc2h-4.0.0-BETA.jarBeta·21 Aug 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 1.9 MB
    1.20.1 to 1.20.61.20.1 to 1.20.6The latest file for its Minecraft version and loader·Forge3.5.03.5.0 · lc2h-3.5.0.jar (main file)·24 Apr 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.2 MB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge3.4.03.4.0 · lc2h-3.4.0.jar (main file)·5 Apr 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.1 MB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge3.3.03.3.0 · lc2h-3.3.0.jar (main file)·7 Mar 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.1 MB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge3.2.73.2.7 · lc2h-3.2.7.jar (main file)·5 Mar 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 1.0 MB
    1.20.1·Forge3.2.63.2.6 · lc2h-3.2.6.jar·27 Feb 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 1.0 MB
    1.20.1·Forge3.2.53.2.5 · lc2h-3.2.5.jar·22 Feb 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 1017.8 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge3.2.43.2.4 · lc2h-3.2.4.jar (main file)·14 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1004.6 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge3.2.33.2.3 · lc2h-3.2.3.jar (main file)·27 Jan 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 977.9 KB
    1.20.1·Forge3.2.23.2.2 · lc2h-3.2.2.jar·26 Jan 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 977.6 KB
    1.20.1·Forge3.2.1-HOTFIX3.2.1-HOTFIX · lc2h-3.2.1-HOTFIX.jar·20 Jan 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 959.8 KB
    1 to 20 of 2312

    Quick fixes

    In the last 2 years, 5 releases needed a quick fix: a new release within 3 days to fix a problem. This lowers the grade by 2 points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.5

    • lc2h-omni-4.2.2-LTS.jar8 Sep 2026LC2H V4.2.2-LTS Fixed the blender’s slow init/role bottleneck bug. Role and…
    • lc2h-4.1.2-RELEASE.jar1 Sep 2026Fixed the last V4.1.1 cleanup issues and shipped V4.1.2:]…
    • lc2h-4.1.1-BETA.jar30 Aug 2026LC2H V4.1.1-BETA Fixed glow lichen and Immersive Weathering frost cleanup…
    • lc2h-3.2.3.jar27 Jan 2026…V3.2.3 Overview This patch fixes a rare but nasty stall caused by a blocking multichunk…
    • lc2h-3.2.1-HOTFIX.jar20 Jan 2026…LC²H V3.2.1-HOTFIX | Tick-Budgeted Retry Queues…