3D Lighting: History, Concepts, and Techniques (With CD-ROM) by Arnold Gallardo

By Arnold Gallardo

Книга для 3D-визуализаторов из разряда «маст хэв» - прекрасно иллюстрированное справочное пособие по созданию освещения сцены: теория, общие принципы, конкретные примеры.

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Extra info for 3D Lighting: History, Concepts, and Techniques (With CD-ROM) (Graphics Series

Example text

This creates what is called halation. Halation creates secondary ghost images in the film, which to photographers is bad because they are a by-product of unintentional light and film interaction. F IGURE Light interaction. 1 CHAPTER 3 FUNDAMENTALS OF PHOTOGRAPHY AND CINEMATOGRAPHY F IGURE Light passing through film. 2 Most modern films have an antihalation backing to prevent this from happening. Antihalation backing is normally dark brown when dry and after development is sometimes seen dissolved as a pinkish-red coloration.

When projected, the black areas absorb light and the light areas let light through. Since the light did not strike the unexposed film evenly in all areas, some areas partially allow light through. When developed and projected, these areas are perceived as subtle tonal gradations. This is how we perceive tones in film and is the basis for all kinds of film we use today. Special films such as infrared are also based on these principles. L IGHT AND F ILM I NTERACTION When light passes through film, it creates several physical manifestations that affect the film.

Looking is a passive process of obtaining visual sensory information; seeing has a component of recognition and comprehension. To understand this concept better, we must examine the concept of sight. Although we look at things every day, sight is actually a very complicated phenomenon. As infants, we use our eyes to engage the world around us; to find colorful, shapely things to pick up; and to distinguish and remember familiar faces. We also try to avoid situations that recede into the distance, into which we could fall.

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