How Do I Get Dark Edges Effect?

[Snyper0012]

How do i get this effect to work on my computer. My Racer version is 0.8.6.
http://www.tracciontrasera.es/modules/coppermine/albums/Juegos-RacerCars/racerpic176.jpg

 

[pradzio1]

In config.exe set quality to high or extreme level.