Questions About Graphical User Interfaces

[Romulator]

I can only assume it is based on your monitor's dimensions or settings in your in-game options, just like any other game.

Playing just about any game at lower than it's normal resolution will bring scaling issues. You could also configure some stuff in your settings which dictate how big/small things are based on things like your texture filter, blooming, using billinear or trillinear, etc.

Under heavy assumption how all trailers when FrictionalGames and TCR released their YouTube teaser trailers were in 1080p, I assume they're using 1920x1080 resolution, which will probably run without any scaling as it is likely the "natural" dimensions for running the game.

Edit: Your .tga link is also broken. Just letting you know