DirectX 11 performance first look: Dirt 2
 

In Dirt 2, it’s used in three situations: when your car crosses a pool of water, for the crowds watching the races and for flags flying by the side of the track. As you can see from these pictures, tessellation helps add more realistic, more detailed shapes where you would like it, but wouldn’t want to use computationally intensive high-detail models.


http://www.bit-tech.net/gaming/pc/20...-look-dirt-2/1