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In the run up to the launch I spoke with Dan Greenawalt, Lead Game Developer at Turn 10, who told me that this focus on ensuring a high frame rate was the reason Forza 4 doesn't feature dynamic weather or races that transition from day to night. Particle effects like tire smoke and dust look great, hanging in the air realistically without causing frame rates to falter below a constant 60 fps. The Forza tracks are simply stunning, and a huge improvement on Forza Motorsport 3, where certain settings suffered from looking washed out. GT5's premium cars may still (just) have the edge, but unlike in that game, Forza doesn't have two different levels of detail-every car has a fully rendered interior and none have been dragged kicking and screaming from 2006. The first thing you'll notice is a big improvement in the graphics. From where I'm sitting, it's clear that there really is a new king in town. Ever since Sony finally shipped Gran Turismo 5, console racing fans have been waiting to see how Turn 10, Forza's developers, would respond. As Ars Technica's resident petrol head, it's no secret that I've been eagerly anticipating getting my hands on Forza Motorsport 4, the latest installment of Microsoft's marquee racing game for the Xbox 360.