The use of perspective in art is necessary to represent the form of a three-dimensional object on to a two-dimensional drawing in a way that looks realistic.
Drawing these blocks was by far my least favorite exercise. In perspective drawing, lines that are parallel in real life will eventually 'meet' when drawn. The eventual intersection of these lines is called the vanishing point.
Drawing interior spaces like hallways or corners of rooms is a good exercise to practice perspective drawing.
|Ended class with a 5 minute sketch: one point perspective|