Framerate is minimum 55 fps on GF3 ti and Athlon 1200. Most places it's around 70 - 80 fps. Trees aren't killers if you make your own. There's a lot of them too. Actual map is little darker and foggier with several layers of moving mist. I cleaned up the pictures a little so you could see better.
I consider that a real compliment coming from you. I've seen your work. Very high quality stuff. I did my best not to make any trees or bushes the same, so it uses a bit of texture memory.