For a triple-monitor 4K setup, look for "Prismatic" or "Chroma Crystal" designs that span all three screens:

Razer prismatic wallpapers for triple monitor setups : r/razer Razer Triple Monitor Wallpaper | Pixelz

An 11520x2160 resolution wallpaper is a massive panoramic image designed for triple 4K monitor setups. When combined with , these wallpapers are often dynamic, using Razer Axon to sync the lighting on your desk and peripherals with the colors on your screen. Best 11520x2160 Razer Wallpapers