060 Perspective
A convention whereby a 3-D space can be depicted on a flat surface.
A viewer looks at a scene from a fixed point. Between viewer and scene is a defined plane, known as the “picture plane.” Rays of light from the scene pass through this plane on their way to the viewer’s eye. If their points of passage through the plane are recorded and reproduced, the resultant image is identical to the viewer’s experience of the real scene.
• Objects that are more distant will appear to be smaller.
• Objects lying obliquely to the viewing angle will appear to be distorted because they will get smaller in the plane extending away from the viewer but remain stable in the plane standing at right angles to the viewer. This effect is known as “foreshortening.” ...