Page 337 - Green - Maritime Archaeology: A Technical Handbook. 2nd ed

316 Maritime Archaeology: A Technical Handbook, Second Edition
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Figure 11.14 (a) Hand-drawn shading; (b) computer-generated shading with light coming from the upper right.
To learn how to shade effectively, start by practicing on some simple geo- metric objects, spheres, cylinders, and cones and then develop some more complex geometric objects (the Death Star from Star Wars, a wine glass, etc.). Once shape can be given to an object, techniques to show texture and even color can be developed. Texture can often be inferred very effectively using hatching, and this is particularly useful for wrought iron and wooden objects where the grain can be indicated with the hatching (Figure 11.0 shows the progress of drawing an object).