SWELL makes "On The Fly" Proceedural Clouds and maps them to 2-D. This is what the Gaming Engines do and allows for incredibly FAST frame rendering.

You have to think- if GAMING Software uses Real-Time Mapping of Procedural Clouds onto Vertical Planes for great Visual Effect AND HIGH SPEED RENDERING- then it makes perfect sense for E-ON to use the same techniques for ECO-CLOUDS.