S-curve (art)

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  The Venus de Milo statue has an S-curve form.
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  Diagram S-curve form of Doryphoros by Polykleitos

In the visual arts, an S-curve is an S-shaped curve that serves a wide variety of compositional purposes. The term is usually applied to the standing human figure bending first one way and then back the other. It may also be applied more generally, for example in landscape painting and photography.