Artists utilize organic shapes and geometric shapes in different ways. When attempting to create a piece that looks natural, flowing, soft, peaceful, or calming, organic shapes are generally the shapes of choice. When attempting to create a sense of chaos, anger, or rigidity, geometric shapes are used. Geometric shapes may also be used to create abstract interpretations of things that would normally be depicted as organic shapes.

Volume and Mass
Shape is considered to be a two-dimensional element, while three-dimensional elements have volume or mass. Therefore, a painting has shapes, while a sculpture has volume and mass.