The vanishing point is employed as part of the perspective system, which allows the illusion of a three-dimensional world to be created on a two-dimensional image surface. Specifically, the vanishing point acts as the reference point for measuring angles between lines that appear to converge at it. These angles are used by the artist to create the appearance that distant objects are receding from view.
Without using a vanishing point, all of the lines in a scene would meet at one central location where they could not be continued. This would make it difficult or impossible to draw objects farther away from you than what can be seen without turning your head or looking down. The use of a vanishing point solves this problem by having some of the lines appear to go beyond the edge of the picture plane. These extended lines become parallel and therefore seem to come from one single location, even though they may be drawn with a brush or pencil.
In addition to allowing artists to depict scenes with more distant subject matter, the use of a perspective grid also helps them accurately place elements within the image. The vanishing point is usually indicated by a small dot near the center of the page. It can be anywhere from half to completely covered by another object if it is not visible at first glance.
The vanishing point in a linear perspective drawing is the point on the horizon line when the receding parallel lines fade. It is what allows us to produce three-dimensional drawings, paintings, and pictures. The closer the objects are to each other, the smaller they appear from far away.
Vanishing points can be either natural or man-made. Natural vanishing points occur when two distant objects intersect the same plane boundary (such as the horizon in a landscape scene). Man-made vanishing points are used in architectural drawings to indicate where parallel walls meet. They are also used in mechanical drawings to indicate where different components of a machine meet.
In a drawing that uses linear perspective, all the visual cues to depth come from relative positions of objects on the two-dimensional paper surface. The farther back an object is from you, the more it appears to sink into the page. The closer an object comes to you, the more it appears to rise out of the page. This is why it is important to establish accurate distances between objects in a linear perspective drawing.
2 oblique linear perspective, which is used to depict three-dimensional objects within a two-dimensional setting (such as a magazine article).
In real life, the best method to demonstrate this is to stand in the center of a straight road. Now look up and down the road. Where does it end? This is your vanishing point.
In a two-dimensional drawing or painting, all you have are lines. They can be real or imagined. They can form shapes such as squares, rectangles, or circles. But without using some kind of reference point to tell you how far away objects are, all you can do is draw lines from left to right and top to bottom. This means that even though you may want to show that two sides are equal in length, there is no way for you to do so unless you use something to measure them with. That "something" is called a scale. Scales can be actual physical objects that you mark up to indicate size or they can be numbers written inside the picture itself. Either way, scales are used to let you know how far apart certain things are in your drawing or painting.
Do you see where it ends? There's nothing but sky now, but if you walk forward enough, you will eventually run into a tree, a car, or someone. This is called the horizon line.
A vanishing point is a point on a perspective drawing's image plane where two-dimensional perspective projections (or drawings) of mutually parallel lines in three-dimensional space seem to converge. The visual perception of parallel lines appearing to converge on a single point allows a viewer to estimate the relative distances between themselves and other objects within the picture or drawing.
In reality, all points in the image plane are equal in distance from the camera; however, only one point, which is usually that located in the middle of the image plane, appears to be closer because of its proximity to the viewer. All other points appear to be equally distant from the viewer, regardless of their actual physical location.
On a flat surface, like a piece of paper, there is only one vanishing point: the center. On a curved surface, like the side of a cone, there can be many vanishing points. It depends on how far away the viewer is from the curve.
If you were to walk around the curve, you would eventually reach a point where there are no more curves to walk around. And since there are an infinite number of curves you could walk around, there could be an infinite number of vanishing points on a single curve.