GDPE diagrams forms 04

You’ve definitely seen shapes and/or forms before, because they are everywhere. They are, in fact, an integral part of the conceptual framework that our brains use to identify objects. Forms can be free form, organic, naturalistic, geometric, lifelike, exciting, sad, aerodynamic, symbolic (think letters...), and many other things our brains assign them. But forms can also be entirely abstract, as the Greeks (Euclid included) used to think of them: perfect forms, existing only in abstract thought, from which all physical forms were (imperfectly) derived.

But even the most abstract forms in the visual arts have some objective qualities. Case in point, Malevich’s referred to his 1915 piece Black Square as the "zero point of painting1," meaning that, other paint on canvas, it was nothing: just near-complete abstraction. Yet despite this high-minded rhetoric, it's chock full of objective elements, so it can still be referred to as a rectilinear form (shape) that is dark black (value) and, at the time of this writing, has a crackled patina (texture).

Kazimir Malevich, "Black Square," 1915