auto
/usr/share/images/desktop-base/desktop-background.xml

/usr/share/desktop-base/active-theme/wallpaper/gnome-background.xml
50
/usr/share/desktop-base/futureprototype-theme/wallpaper/gnome-background.xml
40
/usr/share/desktop-base/joy-inksplat-theme/wallpaper/gnome-background.xml
30
/usr/share/desktop-base/joy-theme/wallpaper/gnome-background.xml
30
/usr/share/desktop-base/lines-theme/wallpaper/gnome-background.xml
30
/usr/share/desktop-base/moonlight-theme/wallpaper/gnome-background.xml
30
/usr/share/desktop-base/softwaves-theme/wallpaper/gnome-background.xml
30
/usr/share/desktop-base/spacefun-theme/wallpaper/gnome-background.xml
30