Photorealistic Real-Time Car Render

This is a quick 2 hour scene I made yesterday, I was originally going to make the car be in a parking garage, but it didn’t look very realistic and I used a background image instead.
There are a few shadow issues in the final image, but overall I think it looks realistic.

Final Image http://imgur.com/ILirxiL

Making-Of:
https://youtube.com/watch?v=uO0p_zkA7Kw