NCIDQ IDFX Practice Exam

Which type of perspective involves the point of view being perpendicular to one of the object's planes?

1. One-point perspective

2. Two-point perspective

3. Three-point perspective

4. Isometric perspective

The correct answer is: One-point perspective

The correct choice is one-point perspective. This type of perspective is characterized by a single vanishing point on the horizon line, which is used to represent a scene where the viewer’s line of sight is perpendicular to the object's plane. In one-point perspective, objects are drawn such that parallel lines converge toward this one point, creating the illusion of depth and dimension as the viewer looks straight on at the front face of the object. This approach is particularly effective for depicting interiors or objects like hallways, roads, or rooms, where all lines parallel to the viewer’s direction vanish toward one vanishing point, emphasizing the depth of the space in a straightforward manner. In contrast, two-point perspective involves two vanishing points and is typically used when the objects are viewed at an angle rather than straight-on. Three-point perspective introduces a third vanishing point, usually above or below the horizon line, to represent objects in a more dynamic viewpoint, often looking up or down at tall structures. Isometric perspective differs from these as it does not have vanishing points and instead represents objects without perspective distortion, maintaining scale along all axes.