This lesson is dedicated to the perspective of any plane that is perpendicular to the picture plane. It means that we will consider vertical planes, and inclined planes, too.

As we know (Lesson 4), any plane is described by the trace **t** (intersection with the picture plane) and by the vanishing line **i’** (imagine of the line at infinity of plane **i**, namely its laying in the space). Remember that the trace **t** and the vanishing line **i’** are always parallel.