Free download Deep Space Moon Ultra HD Desktop Background Wallpaper for [ 5760x1080] for your Desktop, Mobile & Tablet | Explore 24+ 5760X1080 White Wallpapers | Wallpaper HD 5760X1080, 5760x1080 Gaming Wallpaper, Free 5760x1080 Wallpaper
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).
Rick And Morty Triple Monitor Wallpaper | Pixelz
510988 5760x1080 Image for Desktop: space - Rare Gallery HD Wallpapers