One-Point PerspectiveIntroductionOne-point perspective is when an object is directly in front of an observerand not seen at an angle. The principal surface of an object is parallel to thepicture plane and to the station point. The remaining structure of the objectis perpendicular to the picture plane. For this reason, one-point perspectiveis also called parallel perspective. One of the most common uses of one-point perspective is in interior architectural illustrations. For interestingstudy on one-point perspective, study tromp-l’œil drawings and paintings.One-point orparallelperspectiveOne-point or parallel perspective places two principal edges (height andwidth) of one surface of an object parallel to the picture plane. Height andwidth have no vanishing point and appear in true length since they areparallel to the picture plane. Only the depth dimension must be put inperspective, and this requires one vanishing point. The station point is infront and parallel to the object and the vanishing point is directly behind. Tofind the third dimension representing depth, project visual rays from thestation point to the vanishing point. Changing the location of the vanishingpoint or raising and lowering the eye level affect perspective.Figure 5-12 shows one-point perspective with vanishing points behind andabove the cube or object.Figure 5-12.—One-point perspective.5-13