So I have this cool background I like. I set it as my background, but in Unity-Greeter, (Not the lock screen) I just see the default "bruised" wallpaper for 14.04. Ick. Does anyone know how to make my custom wallpaper show on the login screen? I know new wallpapers can be added to the default wallpaper set. (I think when you use xfce4, the default Debian background and the Debian Inksplat background appear alongside the other available wallpapers. Also,after using xfce4, the default xfce background becomes your unity-greeter wallpaper, but when you login to Unity, your previously selected desktop background still appears. If you change the wallpaper and back, the xfce greeter background dissapears.) How can I make unity-greeter diaplay my custom wallpaper?
This can be done easily with Ubuntu Tweak. Just click Tweaks, Login Settings, and then "click the button to change the login screen background". If you want your session wallpaper to be used, there's a one click button for that, "set the same background as the current desktop background"