planes of reference
Quick Summary
In sculpture, planes of reference are imaginary surfaces used to describe the orientation of forms, axes, and surfaces in relation to each other, a spectator, and their surroundings. The principal planes are frontal, horizontal, and two profile planes. These planes, along with axes (imaginary center lines), help define the spatial composition and characteristic poses of figures in different sculptural styles. For example, the principle of frontality guided Archaic sculpture, while the contrapposto pose, involving opposing tilts or twists of body parts, is seen in later works. These principles are fundamental to how sculptors organize mass and space to create expressive compositions.1
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