This document discusses various elements of 3D design, including form, mass and space, line, plane, surface qualities, texture, color, and light. It provides examples of sculptures, buildings, and designs to illustrate concepts like negative space within forms, the relationship between 2D and 3D elements, using texture and color to emphasize surfaces, and how light can illuminate and reveal forms. The document examines both the formal qualities of 3D design and how those qualities can contribute to an object or space's meaning and expression.