Various forms the human eye and brain perceive, have to form this certain identity. The way the form interacts with space and/or other forms taking space will determine what identity it takes. These identities are the basic forms we know as the dot, the line, and the plane. Under those main basic forms, we have categories that lie under them. With the line and the plane, there can be a category for being geometric or organic. Now, the plane can have the illusion of seeing it as three-dimensional or with some surface activity.