I get the grass, here's my settings, they are all at custom :
Environment Detail : Max
Lighting detail : Medium
Shadow detail : Medium
Specular effects detail : Disabled
Terrain Resolution : Max
Terrain texture size : Max
Water Detail : Max, so as to get reflective water
Detail objects : max
Object Texture detail : medium
Animation detail : max
View Distance : High
Overhead Camera Distance : High
Anti-Aliasing : Disabled
Front Shadow : Disabled
Front Texture Detail : Disabled
Shader Detail Quality : Max
hope this helps !