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A player spawns a car, the server just has to send the ID and the type of car designed for that vehicle. So when the player drives his car, the wheels would have to rotate in order to move, the server-side script decides on which direction they are going to rotate and the client-side Lua makes that happen. (Controlling 2 game objects angles would require of a 2byte packet which tells the yaw of the object, instead of the server being sending 2 packets (2 because they're front wheels) that send a pitch, yaw, roll message that has a bigger size)