From Fedora Project Wiki
< Artwork
Backgrounds
File:Artwork Backgrounds Background050621.jpg
Background Basics - basic background "things to consider".
If you would like to submit Fedora backgrounds, designs and other artwork, including sound themes, see the Contributing section of the ["Artwork"] page.
Note: The following text references background channels, which have not yet been implemented in GNOME. Feel free to create and submit backgrounds regardless, though!
Design & submit your Fedora backgrounds and become part of the Fedora Backgrounds Channel. The Background Channel will provide subscribers with periodic Fedora background updates to their desktop...and that background might be yours!
Technical aspects of Background Channels can be found at [1]