The right cloud looks like way too much Copy'n'Paste of the same small patch. Especially the upper left part.

The repetition is a result of the very bad noise image (and noise model = a sphere) that I'm currently using:

"Falls das Resultat nicht einfach nur dermassen gut aussieht, sollten Sie nochmal von vorn anfangen..." - Manual

Check out my new game: Pogostuck: Rage With Your Friends