Based on the beautiful photo by Dennis Jarvis:

https://www.flickr.com/photos/archer10/7614450302

This is the full version. Here are some key features (but far from all):

* Seamless transitions from day to night, beautiful sunrise and sunset
* Sun moves over the sky
* Moon and shooting stars during night
* Select real time and the wallpaper never looks exactly the same
* Turn on GPS position to let the app calculate your exact sunrise and sunset times
* Or select a static time yourself, to always show the sky and colors at your favourite time of day
* Parallax effect (Gyroscope) that gives a magical depth to the wallpaper when you move or tilt your phone
* Tons of other different settings for customizations

Other contributors:

Moon:
Luis Argerich
http://www.flickr.com/photos/lrargerich/3525930915/

Forest:
Grant Bishop
http://www.flickr.com/photos/64609422@N04/6011638842/

Forest
U.S. Forest Service, Southwestern Region, Kaibab National Forest
http://www.flickr.com/photos/kaibabnationalforest/4459545321/

Thanks for the creative commons licenses!