PLANES
IN SEVERAL POSITIONS UNDER A SINGLE VIEW POINT

After finding the vanishing, view and depth points, sketch any kind of segment on the space. At one of the ends of this segment, sketch a line to the vanishing point and from the other end, sketch a line to the depth point. At the intersection of these lines you will find the depth of each segment. This is how we obtain the respective planes or the squares on a shortening (scorcio) scale. See figure nº 9. 