This document defines key elements and principles of 3D design including line, shape, form, space, texture and color. It discusses compositional principles like unity, balance, emphasis and rhythm. It also covers color theory concepts such as complementary colors, color schemes and warm/cool colors. Additionally, it defines terminology related to aesthetics and art criticism including medium, mixed media, installation art and the four-step process of describing, analyzing, interpreting and making a judgment about a work of art.