The demo pack can be used to find out if your pc is capable of running VRC, look for a framerate of 40 fps for a single car, and min. 30 fps for all 10 cars. Lower frame rates will affect the true r/c feel.
The VRC Drifter park is ideal to try out a radio controlled car and on this wide open parking lot even the keyboard input will work. The RC Speedway is more demanding but is also doable with keyboard input, but a joystick or any of the VRC USB controllers is adviced.
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