catalyst/overlay/usr/share/gnome-background-properties/xenia-waves.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE wallpapers SYSTEM "gnome-wp-list.dtd">
<wallpapers>
  <wallpaper deleted="false">
    <name>AA Xenia Waves</name>
    <filename>/usr/share/backgrounds/xenia/waves.svg</filename>
    <filename-dark>/usr/share/backgrounds/xenia/waves-dark.svg</filename-dark>
    <options>zoom</options>
    <shade_type>solid</shade_type>
    <pcolor>#ffffff</pcolor>
    <scolor>#000000</scolor>
  </wallpaper>
</wallpapers>