On Tue, Jun 16, 2020 at 7:46 am, Michael Catanzaro mcatanzaro@gnome.org wrote:
Select the animated background in gnome-control-center and see for yourself how it works. :) It's an XML file that describes state transitions between static images. Usually only the colors vary, transitioning to darker colors at night, lighter colors in the morning, standard colors during daytime.
I should add that GNOME upstream has been using animated backgrounds by default since... again, I don't remember, a long time. It's not a gimmick, it actually looks good and works well.