An environment with a tree is simulated through the 4 seasons.
Simulating the tree leaves in this animation was a challange because human eye is extremely good at noticing patterns in movements of the leaves. Any correlation in movement jumps out very quickly. Similar challanges came up while simulating the snowfall. I think it ended up working quite nicely though!
The project was done only for fun, but I received several emails from people on the internet that have requested a high-quality version of the animation for use in a theatre play, in a commercial, and a website.