Well, in my opinion it's simple in principle but it would just be quite a lot of work to implement. There is no "intermediate snapshot" system yet, or even any way to store a snapshot of a given point, to then interpolate between the two. There are just a lot of variables per car to store and interpolate, then there needs to be some careful work on timers just to choose those intermediate points and not trip over itself (getting the timer wrong etc). Just... complicated and a lot of work, when you consider the reality of implementing it, though the idea is indeed simple. Daniel's 1000 Hz method sounds a lot easier to implement and has some advantages but there is the issue of CPU usage. Anyway, I don't want to tackle these at this time, there is too much to do already.