Lamborghini Concept

I think I am starting to get the hang of computer rendering and sketching on a cintiq. Nevertheless, this took me about 3 hours from start to finish. I hope that with a lot of practice, I will be able to take a sketch to this level within 1 hour (which I think is a professional benchmark).
Here is the Lamborghini Concept I sketched today:



Again, I utilized the "lens blur" filter in photoshop to draw attention to the front of the vehicle. Also, a technique used to check the perspective was used -- I flipped the canvas horizontally and then used the transform tool to tweak it a bit. This technique is almost mandatory. In this case, I kept the sketch facing the other way (which is explains why the steering wheel is on the wrong side). This time around, I paid particular attention to the wheels-- I used ellipse selection tools to form them and then freehanded the spoke holes. It is said that if the wheels don't look right, it will mess up the whole sketch, and I find that to be quite true. So, let it be a lesson-- don't skimp out on the wheels.