Exercise 17 Simple linear perspective

When we look down a road or train track the perimeters seem to meet at a specific point on the horizon, and trees and telephone poles along the sides seem to become shorter and closer together. The same happens when we look at a house, a tall building, a train, a simple box or even a car where the sides, top and bottom seem to become smaller, distorting the diameters we logically know to be there.
This type of foreshortening is drawn best with the aid of a technique called linear perspective.
Detailed explanations and illustrations regarding linear perspective can be found in At the Tip of a Pencil: Drawing Basics for Beginners.