Reality and the sim
From the real circuit to Assetto Corsa EVO
Un circuito de terreno, escaneado
Road Atlanta owes its character to Georgia's natural terrain, with constant elevation and corners that follow the contours. The laser scan captures those undulations, which are exactly what makes the circuit hard and what a flat model would erase.
The surrounding woodland, reproduced by photogrammetry, isn't scenery: it's the references drivers use to turn in where the apex can't be seen.
What carries over well
Track memory and external references. At a circuit of blind corners, knowing your turn-in points is practically everything, and that's identical in both worlds.
Also the aero compromise, which here is simple: high downforce, because the fast corners rule.
What doesn't carry over
The vertigo of the descent. On screen the drop to the chicane only half registers; in the car, the falling sensation with the chassis compressing is what makes most people lift too early.
Nor the lack of run-off. Knowing there's gravel and trees out there completely changes the margin a real driver is willing to take.
Visitar Road Atlanta
The circuit is at Braselton, less than an hour from Atlanta, in quiet wooded country. It runs track days, driving schools and club events for much of the year.
The big date is Petit Le Mans in autumn, the most important endurance race in North America alongside Daytona and Sebring, finishing at night. [Confirm dates and access on the circuit's official website.]