1) One point perspective involves drawing a horizon line and placing a single vanishing point on that line to represent the viewer's eye position. 2) To draw a box in one point perspective, the artist first draws a square below the horizon line and connects each corner to the vanishing point with straight lines. 3) These connecting lines, called orthogonals, cause the sides of the box farther from the viewer to appear narrower, mimicking how three dimensional objects appear smaller in the distance.