In this tutorial, Tim Clapham from helloluxx.com takes you through the steps to create a simple cloud fly through using Cinema4D and Pyrocluster. Pyrocluster has got a bit of bad rap over the years for being painfully slow. Tim demonstrates some simple tricks to speed up workflow and ensure you are not waiting around for renders when setting up these type of complex volumetric effects.
This was a quick sculpt I did in ZBrush. I used very few tools: clay tubes, move, smooth, pinch, and the DamStandard brush, which was created by Damien Canderle and is freely available at Pixologic's ZBrush Homeroom site.
Go to the "No More Wine" tutorial, go to step 2, and click the "i" on the thumbnail. It will then give you a link to download the brush.