Ecosystem has nothing to do with animated trees and plants; that is a function of the vegetation generator that's used in Vue4Pro, and Vue Infinite. What the ecosystem does is allow you to designate an area as a system layer, then specify what you want to use for the item assigned to that layer. If you specified say a maple tree to a system layer, then Vue Infinite would create unique iterations of that species of tree, and scatter them across that layer according to the density setting you assigned when you created the layer. You can also assign rocks, people, Poser imports, etc as layer items (download the ecocity animation at either e-on's site on the Vue Infinite spec page, or at belino.net, home of Phoul, who has made the last two demo reels for e-on, and is probably working on the one for Vue Infinite as well. The city structures in that fly-over are the Dystopia city blocks 001 to 010 by Mobius 87. You can find them in the Poser freebie section here). And that flyover was rendrered on a machine with 512megs of ram, so they have some brand new memory management. They have also added an extra function to materials, and that can be used to generate ocean swells. At the moment there is no flowing water, but since Infinite supports Python, there is hope that WierdJuice Software, the creators of Metaform for Poser, can port their app to VueI. Metaform creates dynamic metablobs in Poser (which hasn't any real support for it, so the fact that it works so well is amazing), with implied gravity. There is a small library of predefined emitters, deflectors, and blockers that can be used to generate and control the metamesh flow and behavior. With the shader system Poser has, Metaform has produced running water, dragon'b breath, and burning Poser characters (you can set any surface to be an emitter).