Timelapsed backgrounds is an amazing feature in GNOME, which many people won’t be aware of. This idea written by Soeren Sandman uses a simple XML file to gradually fade between background images over time.
You can try it out by downloading this file [link] courtesy of a Ubuntu user.
I tried it last night!!
seriously, XML is so very useful!
Tip: if you’re smart enough, you can make the change of brightness slower, making it seem more natural…
~LVS