Well I have been working on vegetation, in this image you see 9 trees(150 tris each) and 5000 grass meshes batches with Ogre's static geometry feature =)
I can assure you, no plants were harmed in the making of this screenshot
Next is taller grass that waves in the wind, ooohohoho =P
Shows off:
-Dynamic Day night cycle
-Attached sunlight
Soon to come:
-Moon
-Clouds/stars