Credits to Joseph from the development team, Cinnamon 2.4 will gain support for background slideshows:
So far, two types of background collections are supported:
- Cinnamon background collections, which are XML collections provided by the OS or installed via the Software Manager (in the screenshot above we can see mint-backgrounds-qiana and mint-backgrounds-petra)
- Filesystem directories, which you can add or remove via the interface
The interface remains simple with the ability to either pick a single background from a collection or activate a slideshow for that collection.