Clearly the plastic lower trim is just for testing's sake, and it just so happens to make everyone think it's a Mustang or Nissan Altima Coupe. As it is neither of those things, I added the camo-pattern to the lower body trim to simulate the presence of painted panels. I also did my best to draw the contour of the window according to the Hoffmeister kink using the clone stamp tool. And to further accentuate the non-trunk taillamp piece, I removed the round test-mule LEDs.
Notice also that some body panels are raised. DO NOT BE FOOLED. Those panels are used to cover newly innovated contours and creases. They also make you hate the spy shots so that you're wowed when the car makes its debut.