Again, for this scene I setup the cloudtank effect and instructed Greg Galliani, (Junior 3D Animator) how to use the setup. The clouds were originally done with Arete Digital Nature Effects. I then applied the animated texture map on grids within Softimage using a displacement to achieve this pretty convincing effect.

Added note: There was only one original rolling cloud effect done. With creative layering it had proven to be very versatile.