Hey

That's a pretty good attempt there

The backdrop and rims fit very nicely, and the colour is quite cool too
However - the paint lacks the necessary contrast in highlights and sharp reflections to make it look real - instead it looks a little flat

But that is something you will improve with practice
For now you must concentrate on other mistakes:
->The reflection on the ground still shows a white car, and is too small compared to the rest of the car
->There is some sort of old backdrop through the bottom of the wheels which shouldn't be there
Overall a nice chop - keep it up
