A one-point perspective is a type of perspective drawing in which all the lines in the drawing converge at one specific point, called the vanishing point. The one-point perspective is used to provide a sense of depth to a drawing, as images in the foreground are bigger and appear to be closer than the smaller images in the background.
A one-point perspective drawing features parallel vertical lines and parallel horizontal lines. Calin Teodorescu for Tuts+ suggests caution when choosing the vanishing point for a one-perspective drawing. One pitfall of artists is placing the subject of the drawing on the same side as the vanishing point. This causes the subject to have only two sides instead of three, making the subject appear flat and boring. By placing the subject on the opposite side of the vanishing point, an artist can further accentuate the subject by contrasting the multiple dimensions of the object to the rest of the picture.
A one-point perspective drawing is best used for depicting architectural interiors of long rooms, concept art and object concepts in which the front of the subject is facing the viewer. A well-known example of a drawing using a one-point perspective is a pair of railroad tracks fading off into the distant horizon.