A simple but useful application which retrieve an image from the internet and set it as a wallpaper every 30 minutes.
Watch the sun rise and set all over the world on this real-time, computer-generated illustration of the earth's patterns of sunlight and darkness. The clouds are updated every 3 hours with current weather satellite imagery.
And every half hour, these images are composited and mapped onto a sphere by xplanet according to the relative position of the sun. The flat maps are post-processed by ImageMagick to cut off the 15 degrees nearest the north and south poles where cloud data is unavailable.
4 different types of maps:
Dawn to dusk