I made some wallpapers for Devuan, using a base image that the artist released under Creative Commons (and I sent an email to see if he would release it under GNU or similar):

Ascii: https://pasteboard.co/IUFJHBY.png

Beowulf: https://pasteboard.co/IUFKSGx.png

Chimaera: https://pasteboard.co/IUFL4fx.png