The default look for ultrawide is like below - this makes the game unplayable (you can't see detectors).

Luckily after implementing a simple fix you can use your full viewing area:


If the fixes don't take, make edited files read-only. Also it may be necessary to redo all the steps after starting a new save. I don't know why but this is how it works :/

Find engine.ini file - the default location is:

Windows <path-to-game>\DiggingGame\Saved\Config\Windows\
Steam Play (Linux) <SteamLibrary-folder>/steamapps/compatdata/3244220/pfx/

At the end of the file add:

Save the file, run the game, enjoy proper ultrawide view.

On top of that you might want to tweak FOV to your liking - remember that this can reset if you change the settings in-game.

Find GameUserSettings.ini file - the default location is:

Windows: <path-to-game>\DiggingGame\Saved\Config\Windows\
Steam Play (Linux): <SteamLibrary-folder>/steamapps/compatdata/3244220/pfx/

Add the following line to the file (pick FOV that suits you best according to preference)

Save, run the game, enjoy the result.