@rap-tea-kewl
You left the area behind the windscreen "normal", the dust-cloud (is that the right word ? ) should be visible there, too (you shouldn't be able to see the rails). Also the green LX can be seen way too clearly, i think that all the floating/flying dust and sand that is left behind the first one should "mask" the car behind. Other than that, it looks frikin' nice, i love the way you made the red one's rear wheel look, and the dirt all over the cars, brilliant! Keep 'em comin' ;D