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    2,054,849 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 25 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 25 Oct 2026.269,417 projects gradedProjects with a letter from A to F. Counted on 25 Oct 2026.
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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    Umbral Skies

    Mod

    New Twilight Forest-inspired huts, trophies, and gloves for the Aether.

    B89/ 100
    • OverviewB
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 1.21.1
    • ModpacksIn 724
    • ReleasesLatest 7 Jun

    Download

    umbral_skies-1.21.1-1.6.2.jar

    Released 7 Jun 2026 · 195.3 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade B

    How grades work

    Strengths

    • Security checks passed
    • Public source code
    • Widely used

    Points lost

    • No release in 5 months−3 points
    • Releases in only 4 of the last 24 months−3 points
    • Some modpacks removed it−1 point
    All 11 criteria
    • Maintenance

      5 points lost22 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.5 months ago (7 Jun 2026) 10 / 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 NeoForge, 1.20.1 on Forge. 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 4 of the last 24 months 3 / 6
    • Stability

      1 point lost14 / 15
      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.41 of the 361 modpacks with two or more versions removed it in a later one (11%) See the 41 modpacks9 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Not measured yet.
      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

      Full points7 / 7
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · TeamTwilight/Umbral-Skies 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.Does not apply. CurseForge links are not in our data.
    • Popularity

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.11,401,093 4 / 4
    • Track record

      1 point lost7 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.3.5 years, 9 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
    Total89 / 100

    54 of the 61 points that apply = 89 out of 100.

    Images

    • Gloves
    • Aether Trophies
    • Reimagined Twilight Forest features

    About

    Umbral Skies is a crossover mod that brings together content from The Aether and The Twilight Forest. It adds Aether-themed variants of Twilight Forest Druid Huts and Wells, using Aether blocks in their designs. Defeating Aether bosses can earn trophies styled after those in The Twilight Forest, and players can equip gloves made from materials sourced from the Twilight Forest.

    Written from CurseForge and the GitHub README . How we write it

    In-game changes

    Does not change the game's code directly.

    Adds 10 blocks, 8 items and 9 recipes.

    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 AetherCDeep AetherBL_Ender's CataclysmBDeeper and DarkerAAmendmentsA

    Details

    Creators
    Drullkus and GizmoTheMoonPig
    License
    All rights reserved
    Downloads
    11.4M
    Created
    29 Apr 2023
    Official page
    CurseForge
    Links
    Source code

    Security

    No harmful code found

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

    What it can do on your computer

    Creates settings files
    The mod keeps its settings in the config folder of your game, where you can change or delete them. Only in its files for NeoForge 1.20.1.

    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 · All 4 latest files checked, last on 15 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.
      4 latest files: the newest file for each Minecraft version and loader. The answer above is about the 2 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
    • Looked for, not foundWe looked for these in the file and did not find them.
      The internet, folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.

    Privacy

    We found nothing it sends

    We read its code without running it: it contacts no web address while you play.

    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

    AI

    No sign that AI was used to make it

    We looked for AI tools in its texts, files, images 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 · 5 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.
      Not on Modrinth.
    • 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
      8 of 18 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
      20 images 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
      43 code files read

    Compatibility

    See all 9 files
    NeoForge
    Forge
    1.191.2126.1

    Point at or tap a version to see its loaders.

    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.Nothing
    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 say they work with Umbral Skies, or that Umbral Skies says it works with.

    ProjectTypeDownloadsDeclared byGrade
    Aether Compat: Gloves For AllCMod208K downloadsdeclared by Aether Compat: Gloves For All

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    60300
    Oct 2024: 49 modpacksNov 2024: 51 modpacksDec 2024: 36 modpacksJan 2025: 41 modpacksFeb 2025: 35 modpacksMar 2025: 36 modpacksApr 2025: 30 modpacksMay 2025: 33 modpacksJun 2025: 36 modpacksJul 2025: 32 modpacksAug 2025: 27 modpacksSep 2025: 38 modpacksOct 2025: 46 modpacksNov 2025: 47 modpacksDec 2025: 48 modpacksJan 2026: 42 modpacksFeb 2026: 47 modpacksMar 2026: 50 modpacksApr 2026: 49 modpacksMay 2026: 58 modpacksJun 2026: 41 modpacksJul 2026: 45 modpacksAug 2026: 57 modpacksSep 2026: 52 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 202449
    Nov 202451
    Dec 202436
    Jan 202541
    Feb 202535
    Mar 202536
    Apr 202530
    May 202533
    Jun 202536
    Jul 202532
    Aug 202527
    Sep 202538
    Oct 202546
    Nov 202547
    Dec 202548
    Jan 202642
    Feb 202647
    Mar 202650
    Apr 202649
    May 202658
    Jun 202641
    Jul 202645
    Aug 202657
    Sep 202652

    More modpacks put it in their new versions than a year ago: 50 a month now, 33 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..

    724 modpacks include Umbral Skies in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    Better MC [FORGE] - BMC421.1M downloadslast version with it 9 Oct 2026Medieval MC [FORGE] - MMC41.2M downloadslast version with it 23 Oct 2026TNP Limitless 8 - LL8333K downloadslast version with it 16 Oct 2026TNP Limitless 7 - LL7241K downloadslast version with it 14 Aug 2026Ice and Fire Magic158K downloadslast version with it 4 Jun 2026TerraFirma Rebirth 2133K downloadslast version with it 4 Jan 2024A Distant Journey - Story of Architects' Prism124K downloadslast version with it 23 Nov 2025NeoTech Reborn113K downloadslast version with it 18 Oct 2026Infinity Legends (Palladium)111K downloadslast version with it 5 Jul 2026PixelBCG - A Pixelmon Modpack99K downloadslast version with it 24 Dec 2023
    1 to 10 of 30123

    Often in the same modpacks

    Mods that modpacks often add together with Umbral Skies. Share: how many of the modpacks with Umbral Skies also have that mod.

    ProjectTypeShareGrade
    The AetherCModin 100% of the modpacks with Umbral SkiesDeep AetherBModin 76% of the modpacks with Umbral SkiesL_Ender's CataclysmBModin 76% of the modpacks with Umbral SkiesDeeper and DarkerAModin 71% of the modpacks with Umbral SkiesAmendmentsAModin 71% of the modpacks with Umbral SkiesYUNG's Better Ocean MonumentsAModin 67% of the modpacks with Umbral SkiesYUNG's Better End IslandAModin 67% of the modpacks with Umbral SkiesYUNG's Better Nether FortressesAModin 67% of the modpacks with Umbral SkiesTwilight's Flavor & DelightAModin 64% of the modpacks with Umbral SkiesServer Performance - Smooth Chunk SaveAModin 64% of the modpacks with Umbral Skies
    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
    1.21.1·NeoForge1.6.21.6.2 · umbral_skies-1.21.1-1.6.2.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·NeoForge, Forge1.31.3 · umbral_skies-1.3.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    Older Minecraft versions
    1.20.4·NeoForge1.41.4 · umbral_skies-1.4.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.19.4·Forge1.21.2 · umbral_skies-1.2.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    9 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21.1The latest file for its Minecraft version and loader·NeoForge1.6.21.6.2 · umbral_skies-1.21.1-1.6.2.jar·7 Jun 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 195.3 KB
    1.21.1·NeoForge1.6.11.6.1 · umbral_skies-1.21.1-1.6.1.jar·26 Dec 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 195.3 KB
    1.21.1·NeoForge1.61.6 · umbral_skies-1.21.1-1.6.0.jar·3 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 195.4 KB
    1.21.1·NeoForge1.51.5 · umbral_skies-1.21.1-1.5.0.jar·2 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 189.7 KB
    1.20.4The latest file for its Minecraft version and loader·NeoForge1.41.4 · umbral_skies-1.4.0.jar·5 Jul 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 197.7 KB
    1.20.1The latest file for its Minecraft version and loader·NeoForge, Forge1.31.3 · umbral_skies-1.3.jar·25 Sep 2023PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 201.9 KB
    1.19.4The latest file for its Minecraft version and loader·Forge1.21.2 · umbral_skies-1.2.jar·25 Sep 2023PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 166.9 KB
    1.19.4·Forge1.11.1 · umbral_skies-1.1.jar·1 Jun 2023PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 133.4 KB
    1.19.4·Forge1.01.0 · Umbral-Skies-1.0.jar·29 Apr 2023PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 25.2 KB