We have developed our own way of scanning track which allows us to have a precision up to 0.5 cm. We can scan the track and then create the simulation track based on this LIDAR scan.
For the environment, there are two ways of doing it, we can do it based on photos and google earth views or we can scan the environment at the same time we are scanning the track which will give a better result in terms of accuracy of the environment and in terms of visual aspect.
This solution is the best quality that we can offer, all the bumps are exactly like in reality, the tarmac changes are in the track and all the marks (to use as reference for the drivers are the same as the real track).
This solution is used by some of our client, especially in Formula E to prepare as best as possible their races.