Animated Wallpapers in 4k

Those wallpapers need the software “Wallpaper Engine” to run. You can get this excellent program for about 4 bucks on Steam:

All wallpapers are rendered in resolution 4k (3840 x 2160), and are optimized for small size and some kind “calming movement”.

The download-links to the actual wallpapers are also links to Steam, but the wallpapers are completely free:

You may also download a static version from the gallery below (in this case you will not need “Wallpaper Engine”):