From DoomWiki.org

Aspect-ratio-4x3.svgThis image is using an incorrect aspect ratio.
Due to behavior of the original Doom rendering engine under MS-DOS, screenshots taken by the original unmodified release versions of id Tech 1 games, as well as some source ports, will appear incorrect when viewed on modern machines. This image should be rescaled to fit a 4:3 aspect ratio. Please see the image guidelines for further information.

Auto-categorizing instance of Template:BaseInfoBox for screenshots with an incorrect aspect ratio, for use in the File namespace only. Categorizes files into Screenshots using an incorrect aspect ratio.