I see what you mean, but the part I am stuck on is when the camera zooms out from inside the car, the window reflection comes in (as the camera has just travelled through it) so the reflection is the full size of the viewers screen. The camera then pans to the left, which brings the car window frame into shot, I do not know how to change the reflection to cut down from full screen to slowly disappearing as the window frame wipes across.
I have had a look at all the tracking advice but can find nothing on about this.
Sorry it is hard to explain I hope you understand it all.
Thanks