By Julie Dorsey
, Page ix
1 - Introduction
, Pages 1-4
2 - Background
, Pages 5-26
3 - remark and classification
, Pages 27-46
4 - Mathematical terms
, Pages 47-60
5 - basic fabric models
, Pages 61-121
6 - really expert fabric models
, Pages 123-159
7 - Measurement
, Pages 161-191
8 - getting older and weathering
, Pages 193-225
9 - Specifying and encoding visual appeal descriptions
, Pages 227-242
10 - Rendering appearance
, Pages 243-275
, Pages 277-302
, Pages 303-317
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Content material: Acknowledgments, web page ix1 - advent, Pages 1-42 - heritage, Pages 5-263 - commentary and type, Pages 27-464 - Mathematical phrases, Pages 47-605 - normal fabric versions, Pages 61-1216 - really expert fabric types, Pages 123-1597 - dimension, Pages 161-1918 - getting older and weathering, Pages 193-2259 - Specifying and encoding visual appeal descriptions, Pages 227-24210 - Rendering visual appeal, Pages 243-275Bibliography, Pages 277-302Index, Pages 303-317
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Extra resources for Digital Modeling of Material Appearance
For a deep understanding of models, rereading the original papers remains worthwhile. We begin with the reflection and transmission at a smooth surface between two homogeneous materials. This solution provides some basic relations used in many other models. We then consider three approaches to constructing light reflection models for more complex materials and surface structures: empirical, analytical first principles, and simulation from first principles. We discuss some issues regarding complex spectral interactions.
Values of κ and n are found by measurement and can be looked up in handbooks or online resources . Generally, understanding and applying the results of the smooth surface solution for computer graphics requires only knowing some rough estimates of typical values of these constants for common materials. 1. 1: The direction of reflection from a smooth surface is in the “mirror” direction (a), and the direction of transmission is given by Snell’s Law (b). 2: Mirror reflection and conservation of energy specify a model that allows the rendering of smooth surfaces.
7) is much more noticeable. In this case, to make the correct judgment about the interaction of the material with light, we must discount the particular illumination as well as our perceptual distortion of light magnitudes. For metals, the fraction of light reflected by pure specular reflection is nearly the same for all angles of incidence. For dielectrics like glass, though, the fraction of light reflected is higher at grazing angles, an effect referred to as Fresnel reflection. 8b, respectively.