FModel Dec 2025

FModel

2025 Update & Recap

One year ago, we migrated everyone to a new continuous delivery workflow.
It made it easier for us to ship bug fixes, performance improvements, and new game support.

Many of these changes rolled out quietly throughout the year, and if you chose to defer updates indefinitely, here's what you missed:

• Nanite static meshes support for both preview and export (@C0bra5 and @LongerWarrior)
• Audio decoding support for proprietary formats, including Wwise, FMOD, CRIWARE (@Masusder)
• Blueprint decompilation (@Krowe-moh and @GhostScissors)
• Massive expansion of supported games (@LongerWarrior)

All of these are the result of contributors dedicating their expertise, time, and effort outside of any full-time work.
And today, to close out the year, we’re releasing a new update that significantly improves how you explore games.

Newly added

• A redesigned explorer that organizes packages in a grid, automatically detects types, and provides quick previews when available. This new system complements the old explorer; you can disable it if you like, but once you get the hang of it, it’s hard to go back
• Filter packages by type within a folder (Mesh, Texture, Data, Blueprints, etc)
• New context menu option to find all references of a package (UE5+)

Bug Fixes and Improvements

• With automatic type detection, context menu options unrelated to a package’s type are now disabled
• Reduced memory usage during package deserialization
• Faster archive load times

To get the latest version of FModel and experience these improvements, download the update from here https://fmodel.app/download or check for updates within the application (Help > Releases).

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Exciting things are already cooking for 2026, and we can’t wait to share them with y’all!
As always, thank you to everyone pushing FModel and CUE4Parse forward through contributions, donations, compatibility threads, or simply by using these projects. ❤️
Happy holidays! 🎄

FModel v4.4.4

FModel 4.4.4

Patch-0 Update

Just in time for the spooky season 🎃
A new update has just been released, that introduces support for many new games, resolves bugs, and brings a more efficient method for managing in-app updates.

Newly added

• Separate update modes are no longer a thing, and you're all treated as part of the (old) QA Testing mode. That means your bug reports and/or contributions (if merged) will immediately benefit the entire community. As of today, FModel builds will all be synced with the dev branch on GitHub, and so, as soon as a new commit is published, a window will appear allowing you to upgrade or roll back to any version you wish. You can also defer updates for 3 days, until the next week/month, or indefinitely and only update when you want to, via the Help > Releases menu.
• Morph targets (shape keys) in UE5 games can be previewed/exported
• UE versions selectors are now searchable to make custom versions easier to find
• Backups are now versioned. Support for unversioned backups will be removed in 1 year
• Sprites preview support
• Z-Layered texture support
• JPEG + TGA (no preview) texture support

Bug Fixes and Improvements

• Resetting when an error occurs properly clears all settings
• Bind pose stripping algorithm
• Array indexed properties in the JSON are now written with their index to avoid name duplicates
• UEFormat models will now export with their textures
• many more

Supported New Games

• The First Descendant
• Game for Peace
• Mortal Kombat 1
• Infinity Nikki
• Wild Assault
• Vision of Mana
• Marvel Rivals
• Delta Force
• Monster Jam™ Showdown
• Rennsport
• Funko Fusion
• Tony Hawk's™ Pro Skater™ 1 + 2
• many more

FModel v4.4.3.6

FModel 4.4.3

Patch-6 Update

Oof, long time no see, right?
A new update has just been released, mainly to transfer changes from QA/Beta to a new fresh Stable release. However that's not it.

Newly added

• Collisions can be previewed in the 3D Viewer.
• Fortnite Lego build instruction blueprints can be previewed if they are opened from a JBID package.
• UEFormat by @halfuwu has been added as a supported mesh export format in the settings. It supports many features that were previously not possible with the dead ActorX format. You can read its source code, and find its importer here. It will become our default format at some point so get used to it.

Bug Fixes and Improvements

• Preview shader has been much improved, meshes should look better than ever.
• Non-encrypted archives containing encrypted packages will be locked until a working aes key is set for them.
• A single vertex can now be influenced by up to 8 bones for both preview and export.
• There's a time multiplier under World in the 3D Viewer if you want to speed up animations.
• Gltf mesh export format has been fixed.
• Custom UE versions are now separated from normal UE versions and they will show from what normal UE version they are based on. You can find them if you click the yellow glowing checkbox next to the selector.
• FModel will visually show archives being loaded and mounted.
• Many many many more fixes and small improvements I can't remember.

Supported New Games

• Way too many, read this

_{Full Changelog: 4.4.3.5...4.4.3.6}

FModel v4.4.3.5

FModel 4.4.3

Patch-5 Update

First 2024 patch has just been released to bring new features QA tested by enthusiasts.

Newly added

• A new update mode (QA Testing) has been added for users who need the latest and greatest FModel. It is synchronized with changes on the dev branch of FModel, so if you need fixes or new features before anyone else, switch to it in the settings.
• Instanced static meshes are now processed and displayed when previewing a level (.umap)
• Fortnite on-demand archives now replace what was previously known as streamed packages.

Bug Fixes and Improvements

• A workaround has been added for bind pose stripped ACL animations in order to be able to preview and export them, just like before.
• .binka audio files can be listened and saved if you have the correct binkadec.exe in your Output/.data folder. A correct binkadec is a binkadec that writes the WAV header before writing the data.
• CUE4Parse now supports mapping files with optional properties
• UTextureCube now get converted to panorama images (@KaiserM21)
• FModel now runs on .NET 8

FModel QA Testing

Dev builds

FModel v4.4.3.4

Commits

• b478d43: yes (Asval)

FModel v4.4.3.3

Commits

• cfa8eee: build (4sval)
• 6dce30b: you back (4sval)
• 84f5d4d: Fixes for texture refactor (GMatrixGames)
• d4e2bf1: SwizzleRoughnessToGreen (4sval)
• 6f11d87: FModel v4.4.3.2 (4sval)
• 3435897: Handle KeepMobileMinLODSettingOnDesktop (GMatrixGames)
• a184a25: explicit ue version (4sval) #401
• 011046a: and this is where problems begin (4sval) #401
• 25c10e8: that's the way (4sval) #401
• 2a265ea: usable (4sval) #401
• d891c3e: migrate main key + fix custom dirs dup + fix manual games add by ref (4sval) #401
• 8fa0277: c'est ciao (4sval) #401
• 1829660: valorant dirs (Asval) #401
• cb347ad: ouin ouin ouin there's two 5.3 (Asval)
• 487e40a: #403 done (Asval)
• 8a72f29: AT9 Support (GMatrixGames)
• a7fd467: Revert "AT9 Support" (GMatrixGames)
• e92a66a: Recommit "AT9 Support" (GMatrixGames)
• 13c74f1: AT9, forgot about this when recommiting (GMatrixGames)
• 993726c: ouin ouin ouin cue4parse errors (Asval)
• 6ed335d: POC frame interpolation (Asval)
• 5dc90e6: virtual textures preview (Asval)
• 946d38c: it is about time the update thread gets fixed (Asval)
• 223dd8f: multiple anims on same model (Asval)
• 250b199: settings layout (Asval)
• d97f570: GetBoneTransform at runtime but it's flickering now, for later me (Asval)
• 51516cd: GetBufferSubData doesn't like being called too much, too bad (Asval)
• 7d698ea: trying to merge 2 skeletons, doesn't fix anything (Asval)
• 1aa45b1: mock-up bone hierarchy (Asval)
• 841f40e: skeleton tree + fixed skeleton bones incorrect relation (Asval)
• ee9f3fe: fixes (Asval)
• 53bfbed: fixes (Asval)
• a1494bf: FModel v4.4.3.3 (Asval)

FModel v4.4.3.2

Commits

• cfa8eee: build (4sval)
• 6dce30b: you back (4sval)
• 84f5d4d: Fixes for texture refactor (GMatrixGames)
• d4e2bf1: SwizzleRoughnessToGreen (4sval)
• 6f11d87: FModel v4.4.3.2 (4sval)

FModel v4.4.3.1

Commits

• cfa8eee: build (4sval)

FModel v4.4.3.0

FModel v4.4.3