There is an Acknex User Magazine article about making a grass/vegetation script that moves the grass along with the player. This way it does not require millions of entities on your level, and it saves your frame-rate. I have used a modified version of this script in my game "Star Explorers," and I'm very happy with the results...
http://www.opserver.de/ubb7/ubbthreads.php?ubb=showgallery&Number=458179AUM is available online for free here:
http://www.coniserver.net/coni_users/web_users/pirvu/aum/aumonline_e/Use the search feature to look for "Serious Vegetation." I think the script they have in old C-Script, but it's pretty easy to change to Lite-C.
