Gran Turismo 6 release date is December 6, which means in a matter of days, I'll be locking myself in for the weekend. However, before I fall off the grid, allow me to share a recently leaked video of new Gran Turismo 6 gameplay. Specifically, the video demonstrates the next-generation racing simulator's advanced atmospheric and dynamic lighting engine.

The following video footage was captured from a booth at the Tokyo Motor Show. Car enthusiasts and gamers alike gathered around the Gran Turismo booth to check out the biggest Playstation racing game of the holiday season. Unlike the 'arcadey' Need for Speed: Rivals and its Michael Bay-esque car chase game modes, Gran Turismo players can be completely enthralled by a fast car, a circuit, and a stop watch. Realism and driving satisfaction come before all.

The video from YouTube channel Angelfish Aquarium shows gameplay at Matterhorn, a famous mountain of Switzerland. While the video doesn't show precipitation, the sky recreates a cloudy overcast that clears up as the sun rises over. The lighting dynamics recreate Matterhorn between 7:43 through 8:22 in the morning.

The Switzerland Matterhorn track is one of the track in Gran Turismo 6 that supports day/night changes, dynamic weather conditions, and accurate astrological simulation. The result of all this digital environment engineering is visually stunning.  However, how does it serve driving realism?

Developer Polyphony worked with tire manufacturer Yokohama and suspension company KW to retrieve every conceivable real-world physics data to inject into Gran Turismo 6. Suspension and tires work together to emulate the level of grip each vehicle has at varying conditions, calculating everything from weather changes to driving style.

According to Polyphony, tire temperature will be handled more realistically and HUD indicators inform drivers of tire wear and tire temperature. Obviously, surface temperatures drop at night or during precipitation. Colder temperatures and wet tracks cause tire grip to drop significantly and demand racers to compete with caution. Of course, dry sunny days allow tire to warm up to operating temperature and retain the heat.

Beyond environmental conditions, driving style and skills dictate vehicle behavior as well. Players can gently roll onto the brakes for a gentler weight transition or slam on the brakes to throw all the weight to the front to watch the car nosedive and the rear get loose. Audio feedback recreate progressive tire squeal to warn drivers that the rubber compounds are nearly the limits of adhesion. In fact, even a sloppy downshift can lock the diff and unsettle your car. On the other hand, Gran Turismo rewards a perfect rev match with a faster lap time.

Watch the gameplay demonstration and the Gran Turismo dynamic change trailer below! Gran Turismo 6 will release on December 6, 2013.