This is just a tech demo, project is not yet optimised >> the fps is not stable on closeups (to fix), and from time to time i get lost in the 3d world :)
It is based of a .blend by gh123man, many thanks to him!
I changed the textures, specular, ambient & horizon color and readapt the python script that controls the camera orientation.
The colors are changing beautifully when I wander around the clouds!
Textures are details of these etchings : frankiezafe.org/index.php?id=242
See gh123man video here: youtube.com/watch?v=wOCWvJDvpd0
rendered on blender 2.69 on a i7 / GTX 650 Ti => 1080p at 60fps