You can also set up bash scripts to change wallpaper to random one every X minutes(I use it with feh), get random wallpaper on each boot, etc. The Arch wiki explains it nicely.
Then link the file like so: ln -sfv /usr/share/images/desktop-base/lockscreen.xml /etc/alternatives/desktop-background.xml
As root, run this: /etc/init.d/gdm3 restart or just reboot. That should do it. That was the process in older versions of Gnome, so as long as it hasn't changed, you should be good to go.
Best Answer
You can use feh:
You can also set up bash scripts to change wallpaper to random one every X minutes(I use it with
feh
), get random wallpaper on each boot, etc. The Arch wiki explains it nicely.