i started Working on Procedual Terrain for Cycles
as well as a Sky texture Node Setup that has Clouds and Stars
the Animation will be driven by the rotation of the Sun.
i renderd a quick test animation to see if everything is working so far.
so check it out here
Now i will refine some values and set it all up so you can easily use the nodetree in your project
All the best
greetings Kai Cent
and leave commentz