https://wiki.ubuntu.com/UbuntuStudio/Artwork/UserShowcase
Ubuntustudio 16.04 Wallpaper Contest
Ubuntustudio 16.04 will be officially released in April 2016. As this will be a Long Term Support version, we are especially anxious to offer an excellent customer experience on the desktop. Therefore, the Ubuntustudio community will host a wallpaper design contest! The contest is open to all Digital Artists and Amateurs, most especially Ubuntustudio enthusiasts. We hope to collect the coolest, most beautiful, inspiring, innovative and downright slick desktop wallpapers. Each artist may submit up to 4 pieces. The Ubuntustudio community will vote on and select 16 final Ubuntustudio Wallpapers! (See what we did there? 16? 4? Clever, eh?) [...]