GameWallpapers.com - Drei Monitore Spiel Hintergrundbilder
100+] Triple Monitor Wallpapers | Wallpapers.com
cinematic, 4k wallpaper, trending on ArtStation, | Stable Diffusion
Some 48:9 triple monitor [5760x1080] wallpapers I've found work well. Seems hard to find ones that don't get grainy and are also good for gaming on middle monitor only (so not distracting).