A cloud generator script has recently been completed to aid in the creation of clouds in Blender 2.5. It uses boxes to allow an artist to individually sculpt each cloud to the size and shape of the aritists liking. I cloud can be created with all materials added in literally two mouse clicks.
Nick Keeline writes:
Three weeks ago I had never seen a line of python code in my life and I had this idea that I wanted to make a cloud sculpting script that would take all of the time out of learning how to set up volumetrics for new users. It really is a testament to how flexible and useful the new 2.5 python api is to learn and implement.
The following is a quick tutorial I did on how to use it....
You can download the script from BlenderArtists. If you use the script or have any clouds to show, please post them on the thread!
This Script only works on SVN 28015 or newer and will problably break on newer releases as the python api fluctuates. But it works for now so have fun!