Chapter 13 Visual Communication: Drawings, Renderings, and Models 441 Copyright Goodheart-Willcox Co., Inc. ■ Presentation. Persuasive in nature, presentation sketches influence the audience and sell the design concept. For any space, designers create these sketches in varying degrees of refinement and sophistication to captivate the viewer’s interest and visually explain the space. With primary use in Design development, use of presentation sketches in Schematic design is also common. Rendering these drawings adds color, texture, light, shade, and shadow, Figure 13-13. ■ Technical. Explanatory in nature, technical sketches show the object or detail of the design in multiple views. Designers create them to explain function, structure, and form primarily in the Design development phase. Technical sketches communicate a design in a clear and neutral manner, focusing more on explaining the idea rather than selling it. They must be readable to others outside the design process, Figure 13-14. Potential employers like to see different types of freehand sketches in student portfolios. They show the applicant’s ability to see and think three-dimensionally. They also exhibit the process and progression of idea generation, rather than just a final product or finished design. Robert Work MFA, Colorado State University Figure 13-13 Presentation sketches may be created in varying degrees of refinement when selling a design to the client.