If I'm not mistaken, those are pictures of a real car. Believe me, I've done quite a bit of Photoshop work, and from what I've looked at in the image appears to be a real car.
For instance, look at the front tire in the first picture. You can see where the sand was pushed back out when the wheel was turned straight. And if you just look at the overall detail of the car you can just TELL it's not a model. Glass reflection, reflection off the paint, plus a couple other things.
By the looks of it the person just took pictures of a real 35th so people would know what the models look like.
-Chris