Wow,,, what a easy thing...... dang.. thanks SFG. One more question.... how do you give the grass the property so even when the terrain turns from a flat ground to a slope, the grass will automatically adjust its placement angles and height? Because when I put those grasses in a sort of rough mountanous terrain, some,,, or few grasses will be placed to the ground but most of them will float in the air.
What I mean is, how do I give them the property of forest where all those trees will authomatically adjust them selfs to the terrain.