If a character is attempting to use the grass for cover to say, sneak up on another player, what happens when the player is outside the rendering distance? It's pretty difficult to use cover that isn't being drawn, thus the approaching player has an infinite advantage.
Would it be possible to provide some cover other than the grass for objects outside the render distance? Perhaps a semi-transparent flat surface drawn about the height of the grass (or half player height that a player could crouch under), displayed where the grass isn't being drawn could provide such cover (being a mostly flat object, it'd be pretty quick to render too)?
It's annoying when games provide some sort of cover for players to sneak around in that can be circumvented by simply being outside the rendering distance or turning graphics options down so far that no ground cover at all is rendered (cough military games cough)... Just a thought.