I worked on a project to create, deliver, and maintain a set of extra default wallpapers starting in Fedora 37 that Fedora users can choose as an alternative to the default release wallpaper. This was to help better support the light/dark mode feature new to GNOME in F36.
These were created in Blender using geometry nodes, each with a light and dark version. I created a write up of the process in a blog post. The sources are in the project repository.