Lecture-3

Convergence:

Parallel lines appear close to each other as they move away from the observer. Here in this example the pencils are lying parallel to each other pointing away from the observer; they appear to converge and are so drawn (shown in fig.97). This is also due to the principle of line of sight being intersected at the picture plane.

The eye level not only dictates but is synonymous with the vanishing line for horizontal lines fig.98, a,b.