Looking at this video, you still have some code somewhere that is rotating the vehicle.

This is making the testing look off. If you CANT disable this other panning, then
create another 'ghost' vehicle entity that gets its x/y/z from the 'real'
vehicle
(but a bit further out from the core), but ONLY gets its pan/ilt/roll from the above code...



You say youre NOT using a second sphere... thats cool FOR NOW.
I see the one in the video IS smooth, but will that always be the case?