change to scenery mode and it will combine the right texture with the right model and you can cycle through them with q and w
I'm getting about 1,000,000 +/- 100,000
no problems really, except for that one texture that is HUGE and covers up the model lol
I ran it in 800x600 windowed, fullscreen, then 1600x1200 windowed and then fullscreen and there was no performance hit