Thanks guys.
Techniques are very simple, nothing extraordinary:
For "AsteroMoon0004" (
tgd), I used One crater shader (big crater) and eight power fractal shaders (perlin billows, one octave) for little craters (fractal billows -> color adjust shader -> add/mix color -> displace shader). The scene is render by two pass (with atmo / without atmo) and mix during postwork (on my old computer, it's faster than directly tweaking the atmo on TG2, but you can do it on TG2). After that, strong sharpen and autolevel.
For "multi-atmo test (cone d'ombre)" (
tgd) I used a stack of two atmos on a small planet (différent heights, colors, and tweaks). Sorry, I can't explain postwork, my english is too bad.
Same thing for the last one, "Multi-atmo test 0002" (
tgd), with a stack of three atmos (and others tweaks). Almost no postwok here... Just color balance adjust, and add stars.
That's all.