This is both a practical and theoretical guide to the visualization techniques used by contemporary product designers, including freehand sketching, digital rendering, information graphics, and presentation skills. Hundreds of hand-drawn sketches and computer models have been specially created to demonstrate critical geometry and show how to develop sketches into finished illustrations. The book also illustrates how these basic skills underpin the use of computer-aided design and graphic software. While these applications assist the designer in creating physical products, architectural spaces and virtual interfaces, a basic knowledge of sketching and drawing allows the designer to fully exploit the software. Foundational chapters show how these technical skills fit into a deeper and more intuitive feeling for visualisation and representation, while featured case studies of leading designers, artists and architects illustrate the full range of different drawing options available. Practical tutorials give guidance in creating simple and complex forms, as well as rendering and providing context using scenarios and storyboards. Insightful case studies of leading designers illustrate the full range of different visualization options available.