Gran Turismo 5 is the first game in the franchise to provide a damage model, with variations of damage depending on whether a vehicle is a ""Standard"" or ""Premium"" car. The game also features weather effects, however they are only available on certain circuits. Optional Stereoscopic-3D resolution and Karting found a place in the game.Furthermore, new visual effects have been introduced, including dynamic skid marks, dust and the ability for drivers to flash their headlights. A course editor which allows the player to create new circuits by using tools that randomly generate track-parts according to certain player-selected specifications, including the number of corners, the time of day and the number of sectors. There are a variety of themes the player can choose from to act as a base for each circuit design.
The physics is significantly revised compared with GT4; cars no longer instantly turn-in but realistically must load up the outside tyre first, and destabilizing effects (such as under braking) have greater influence.
Gran Turismo 5 is the first game in the franchise to include both mechanical and external damage modelling, including a real-time deformation engine that will process model deformation according to the speed and angle of impact. It is also possible to overturn cars for the first time in the series.The cars in GT5 are separated into ""standard""- and ""premium""-vehicles. Standard vehicles have a less detailed damage model with dirt, scratches and dents appearing on the car in the event of an accident. In addition, standard cars initially could not receive aftermarket wheels - among other aesthetic upgrades, such as wheel paint. However, as of the version 2.02 update this is no longer the case. ""Premium"" vehicles feature a slightly more advanced damage model. Gran Turismo 2 previously included damage, but was limited to mechanical failures only.