I've been taking a Perspective class with Jon Messer at LAAFA on the weekends. We started by loosely sketching a structure and then true-ing it up with a ruler. I, of course, whipped out my paint set and threw in the details and values, after all, this was a crash course on Atmospheric Perspective and I know that it is faster with a brush then with a pencil in this case and about 20 times more fun. The city line drawing was the 3 point Perspective class, a few weeks ago. It's not as complicated as it looks to do and it makes one appear smarter then they really are when adding perspective to a painting or drawing. Jon's next class will be Curvilinear in a few weeks.