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Pictorial sketches are a type of technical illustration that show several faces of an object at once. Such sketches are used by any industry that designs, sells, manufactures repairs, installs or maintains a product. Axonometric and oblique pictorial sketches use a parallel projection technique and are frequently used in technical documents, sales literature, maintenance manuals, and documentation supplements in engineering drawings. Perspective sketches are the most realistic types of drawings used in engineering and technology. A perspective drawing creates a pictorial view of an object that resembles what you see. It is the best method for representing an object in three dimensions. This chapter goes into the details necessary for creating perspective sketches.
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