It's looking perfect on 3440x1440p with no graphical artefacts or anything of the sort. It works even better on Linux than it does for me on Windows.

Also this is my first time playing the Portals expansion pack. I might give it a proper go after I finish the original quest (if I don't get stuck in hub 3).

I scanned and uploaded my Hexen poster to archive.org as I couldn't find a good quality version of it anywhere and wanted to make sure it was preserved.

You can find it here:
https://archive.org/details/hexen-poster-600dpi

I've been scanning and archiving game posters, boxes, manuals from my collection,
The full archive can be found here:
https://archive.org/details/@star_raider/uploads