Link to the tutorial: https://www.youtube.com/watch?v=90wsacQJJoo&list=UUHEXxuE_Xv8bnl518itG5sw
This is great!
Is this for Cycles?
Oh, wait, never mind.
Nice. Whats the render time like for a bunch of these?
The render time depends on how good your computer is. I rendered ten of my cumulus clouds at one hundred samples, and it took approximately five and a half minutes.