I replaced nautilus with nemo file manager, i like nemo much more, but i dont know how to set wallpaper in nemo. If i go to images and right click on image, then select "Set as wallpaper" nothing happens...
Set Nemo as the default file manager
To prevent Nautilus from handling the desktop icons (and use Nemo instead),
gsettings set org.gnome.desktop.background show-desktop-icons false
Set Nemo as the default file manager (replacing Nautilus)
xdg-mime default nemo.desktop inode/directory application/x-gnome-saved-search
Nemo 2.8.7 on
Ubuntu 14.04 LTS