I have a custom wallpaper as my desktop background, but it doesn't show up on the login screen and the default Ubuntu Unity "greeter" is shown.
In the past, they used to show up on the login screen too. For example, my very first wallpaper was of Elsa from Frozen, and then something else from an anime Bleach. They showed up when I booted the PC and stayed there as I entered the password.
I haven't done any major changes to my system. It's Ubuntu 13.10 (don't give me that support has ended thing, it's merely a technical problem that can be solved). I also tried putting that picture in the Wallpapers directory (
Why This is Not a Duplicate
How do I add customized wallpapers so they appear in the dynamic unity greeter? is about adding an image to the default directory so that they can be changed via Right Click>Change Desktop.
How to change login wallpaper? is about having a separate image for background and another for the login screen.
Gradients backgrounds gives default wallpaper on login screen. is about another default wallpaper and it not showing, instead having the default wallpaper.
Desktop Background doesn't show up on logon screen [duplicate] is a duplicate that leads to the first question I mentioned here.
And they're all I could find in the search.