http://blog.wolfire.com/2009/02/trees-2/
I finished up some trees and a few smaller bushes recently. Some of this stuff is still a work in progress, but I was happy enough with how the tree came out to show it off a bit. Here is our new tree in action!
http://cdn.wolfire.com/blog/tree3.jpg
This is still using our standard material shader. Soon we will have a special leaf shader that helps even out the tone so there is not such high contrast between the lit and shaded leaves. Real leaves are translucent, so they glow even when they are facing away from the light. Here is a picture with some other random plants at the base of the tree:
http://cdn.wolfire.com/blog/tree11.jpg
I will have a lot of new plants done soon which I think will dramatically change how the game has looked up until now.
Oh, and there is a new terrain heightmap here also– almost forgot.