Here's what it's likes to properly structure a composition in two point perspective. This sketch is by Robert Gold, the Academy's instructor in perspective basics. In the class demonstration below, Robert set up his elements according to the horizon line and vanishing points he's established. After he's got everything working, he then places characters within the composition. Clicking on the image will give you a little better view.
Robert started with us as a student back in the early days of the Academy and has stayed on as a perspective and background layout instructor. He's also worked on special projects that come to the Academy for production. His expertise in perspective is a big benefit to our Background Design students.