436 Interiors Copyright Goodheart-Willcox Co., Inc. ■ Contour. Originating in the art field, a contour drawing or sketch is one that follows the visible edges of a shape. The contour is the outermost edges of a form as well as changes of plane within the form. It is not about detail, but about the mass of the object. When finished, it looks like a silhouette of the object. Shading is not needed in a contour sketch, Figure 13-8. ■ Thumbnail. These rapidly executed tiny sketches are about the size of an adult’s thumbnail. Rather than spending time creating finished drawings, these doodle-like sketches serve to get the creative juices flowing. Designers often use them during the Schematic design process or to capture an idea or an inspirational detail. These sketches are not finished, formal, or typically used in professional design presentations. See Figure 13-9. Robert Work MFA, Colorado State University Figure 13-8 The contour sketch shows the outermost edges of a form. Robert Work MFA, Colorado State University Robert Work MFA, Colorado State University Robert Work MFA, Colorado State University