Da gibts sogar noch was feines für die Performence dazu:
UNIQUE LANDSCAPES : THE DARK FOREST : LOWPOLYGRASS
File description: This is mmp1d's low-poly version of the grass for The Dark Forest to help with FPS. Just download and install over the top of the original Dark Forest Mod.

http://www.tessource.net/files/cache/5653.html

Grüßchen,
RedMoon