Perspective drawing demonstrates realistic distances in art.
Objects that are further away will look smaller and objects that are closer will look larger.
Perspective drawings give a sense of depth to art. There are two types of perspective drawings:

-One point perspective drawing

-Two point perspective drawing

A vanishing point in perspective drawing is the point at which the point at which receding parallel lines, when viewed in perspective, appear to converge. It is positioned on the horizon line.

The horizon line is at eye level. It is the line at which the ground meets the sky.

As parallel lines move towards a vanishing point in perspective drawing, they appear to get closer and closer together. Eventually, they seem to meet at the vanishing point, even though in real life, they never actually touch. This is what creates the illusion of depth and distance in your drawing.

You might use directional shading to achieve a more three dimensional form as the shading creates a sense of shadows, which makes the drawing more realistic.

One-Point Perspective

As parallel lines move towards a vanishing point, they appear to be moving away from us.

You can use directional shading to create a more three-dimensional form as it gives the viewer of the image a sense of light and shadows.

2 point perspective

2 point perspective is when there are two vanishing points in an image. For example, you will be on the corner of a block of flats and see both ways beside it. This creates a realistic effect as it imitates our peripheral vision which means we can see more than one things at a time.