Line: The path of a moving point, a mark, or hatch mark made on a surface. Value: The lightness and darkness of a hue. Form: Height, width, and depth. 3D Space: The creation of visual perspective and the illusion of depth; the distance around, between, above, below, and within an object of group of objects. Color: Derived from reflected light, the sensation of color is aroused in the brain by response of the eyes to different wave lengths. Shape: The area enclosed by an outline. 2D Texture: The feel, appearance or consistency of a surface or a substance, the tactile quality of the surface of a work of art.