As others have said, the front end looks awesome

I also really like the atmosphere of the whole piece
Rims and backdrop seem to fit well too, though the near side of the car is in shadow, so I think the wheels should be darker
As for window reflections, they not only have to match the backdrop lighting, but the paint on the car too - otherwise they look really fake and out of place. You've still got the same paint from the base, so I guess the window reflections should be similar too
