Of course- again- these are VERY SIMPLE formations. If you look at the PDF and Video in the lower thread you will see that Microsoft built these as more complex shapes in box-like structures. That type of design gives them FAR MORE of a volumetric look and diverse character.

There are 16 total cloud shapes- I'm only using FOUR of the basic Cumulus shapes. Adding some of the whispy forms and further ROTATING the CELLS at 45 degree angles gives the clouds even greater density as well as a VAPOR-LIKE edge.

As I've been saying- YOU AIN'T SEEN NOTHIN' YET! These clouds can look tremendously better than THIS!. Check out the Cloud Tool SDK in GMAX and you can see the actual complex shapes that Flight Simulator uses. But it is nothing beyond what any modeler could make in one day.
But that's E-ON's job- not mine. If they spent just ONE WEEK working on this idea I'm SURE they could crank out a bunch of ECO-CLOUD formations that would look really GREAT!