MECCHA CHAMELEON - Ultrawide (21:9 / 32:9) Setup

One-click setup that makes MECCHA CHAMELEON display correctly on ultrawide monitors (21:9, 32:9, ...) in fullscreen, without the zoomed-in / cropped view.

• Game: MECCHA CHAMELEON (Steam app 4704690), Unreal Engine 5.6
• What you get: native-resolution fullscreen + a working in-game Field of View slider so the picture is no longer zoomed on wide screens.

This is an installer/setup tool. It does not contain the mod code itself. It downloads the required components from their official sources (see Credits) and wires everything up for you, then sets your resolution.

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Why this is needed

On a wide screen the game looks zoomed in / cropped. Things worth knowing:

• The game runs on UE5.6, whose engine default is already AspectRatio_MaintainYFOV, and the game does not override it. So the popular "create an Engine.ini with AspectRatioAxisConstraint=..." trick does nothing here - that value is already active.
• The zoom comes from a fixed first-person camera FOV baked into the game, which no .ini file can change.
• The only reliable fix is a runtime mod that widens the camera FOV. That is exactly what FOVControl (by Amikiir) does, via UE4SS. This repo just automates installing them and sets your resolution.

Result: Hor+ ("horizontal plus") - you keep the vertical view and gain real image on the sides. Note the unmodded game never letterboxes: it already fills the whole panel, just zoomed in. The slider turns that magnification into actual field of view.

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Requirements

• Windows, MECCHA CHAMELEON installed via Steam.
• Internet connection for the first install (components are downloaded).
• PowerShell 5+ (ships with Windows).

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Install

1. Download the latest release zip and extract it anywhere.
2. Close the game.
3. Right-click Install-Ultrawide.ps1 -> Run with PowerShell. Or from a terminal:

   powershell -ExecutionPolicy Bypass -File .\Install-Ultrawide.ps1
   

The script will:

• locate your MECCHA CHAMELEON install via Steam (or pass -GameRoot "<path>"),
• download UE4SS (the official current build that supports UE5.6),
• download FOVControl and its UE5.6 signature fix from Amikiir's repo,
• extend it locally so the FOV also applies to the spectator / death cam (upstream only widens your own first-person camera),
• install everything into the game's Binaries\Win64,
• set your resolution to your monitor's native resolution in fullscreen (override with -ResX / -ResY, or set -FullscreenMode 0|1|2).

Useful options:

-GameRoot "D:\SteamLibrary\steamapps\common\MECCHA CHAMELEON"
-ResX 5120 -ResY 1440        # force a resolution
-FullscreenMode 1            # 0 = exclusive, 1 = borderless (default), 2 = windowed
-DefaultFov 110              # starting FOV written for first launch (60-140)
-SkipResolution              # do not touch GameUserSettings.ini

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Usage

1. Launch MECCHA CHAMELEON from Steam. UE4SS runs invisibly in the background (no window); if you ever need to check it, it writes a log to Chameleon\Binaries\Win64\ue4ss\UE4SS.log.
2. Check the resolution in the in-game settings (native, fullscreen).
3. Go to Settings -> General -> Field of View and set the slider to taste. For 32:9, somewhere around 110-120 is a good start.
   • Set it from the slider at least once: the value is saved by the game, so it persists across sessions and is no longer overridden when you open the menu.
   • Backup hotkeys (optional): F5 = FOV down, F6 = FOV up. Console: fov 110.

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Multiplayer / anti-cheat

• The game ships no kernel anti-cheat (no EasyAntiCheat / BattlEye); it uses the RedpointEOS online SDK with anti-cheat disabled.
• FOVControl is client-side and view-only: it changes only your own camera's field of view, no gameplay, no replication.
• Still, this is an online game. Test offline / in a private session first, and be considerate in public lobbies. Use at your own risk.

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Uninstall

powershell -ExecutionPolicy Bypass -File .\Uninstall-Ultrawide.ps1

• -ModOnly removes only FOVControl and keeps UE4SS.
• Otherwise it removes dwmapi.dll and the ue4ss\ folder from Binaries\Win64.

No game files are ever modified, so uninstalling fully restores the original game.

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After a game update

If a patch changes the game executable, UE4SS may stop loading (the signature changes). Check FOVControl for an updated signature: https://github.com/TakoKylo/MecchaChameleon-FOVControl

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Credits

This project is only an installer and some documentation. The actual work that makes the FOV adjustable belongs to others:

• FOVControl - the in-game FOV slider and the UE5.6 signature fix - by Amikiir: https://github.com/TakoKylo/MecchaChameleon-FOVControl Please star / support the original mod.
• UE4SS (RE-UE4SS) - the scripting runtime that makes it all possible (MIT): https://github.com/UE4SS-RE/RE-UE4SS

If you are Amikiir and would prefer this installer not download your files, open an issue and it will be changed.

License

The installer and docs in this repo are MIT (see LICENSE). Third-party components keep their own licenses and are not redistributed here.