Hunter-Ch04.qxd
9/1/07
5:08 PM
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SURFACE APPEARANCES
4.25
The result of the
technique illustrated in Figure 4.24: detail in the blacks, plus legible type on the label.
reflection can tell the viewer that the wood is glossy, but diffuse reflection is essential to reveal the color and the grain of the wood beneath the gloss. Figure 4.26 is a piece of highly polished wood lit to produce both direct and diffuse reflection. A medium-sized light source has been positioned to reflect in the lower portion of the wooden surface to show the glossy finish. Notice that the slight physical texture in the surface is also revealed by the direct reflection. The light was large enough that it filled the entire family of angles required to produce direct reflection over the whole surface. However, we blocked part of the light with a gobo so that the right part of the surface produces only diffuse
4.26
Direct reflection in the left
of the scene shows the gloss, whereas diffuse reflection at the right reveals the wood grain.
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