In Gran Turismo 4 the characteristics of the cars are realistically designed and calculated so that they handle as per the real-life physics of that particular vehicle, taking into account weight, speed, friction, wind and more. New technology immerses the player in real-life environments such as New York City and the Grand Canyon. Highly detailed vehicles and environment mapping create broadcast-quality graphics, from light and competitor car reflections on the player's automobile to leaves on a tree shaking in the wind.

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