Physically-Based Shading at Disney

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$Background: Physics and Math of Shading - Self Shadow$

What makes a model physically-based?©Disney Enterprises, Inc.
Mitsubishi Electric Research Laboratories, 2005©Disney Enterprises, Inc.This famous study compared 100 materials to 5 popular models. The materials are sorted left to right by relative error. He andCook-Torrance performed generally better than the others, but one can observe that there’s more difference between thematerials than the models themselves. In particular, the materials on the right are poorly represented by all the models. Thisbegs the question as to what is not represented in the models.
Page 2 and 3: © Walt Disney PicturesTangled (201
Page 4 and 5: Outline• Motivation• Measured d
Page 6 and 7: Which shading model should we use?
Page 10 and 11: A Data-Driven Reflectance ModelMatu
Page 13 and 14: github.com/wdas/brdfThe Theta D cur
Page 15 and 16: A schematic view of “Image Slice
Page 17 and 18: Measured data observations©Disney
Page 19 and 20: Diffuse retro-reflection is related
Page 21 and 22: Diffuse models©Disney Enterprises,
Page 23 and 24: Specular models don’t have long e
Page 25 and 26: Ground Glass DataTrowbridge-ReitzBe
Page 27 and 28: Generalized-Trowbridge-ReitzGTR =1G
Page 29 and 30: Albedo of various models smoothro
Page 31 and 32: Principles1. Intuitive rather than
Page 33 and 34: Parameters ©Disney Enterp
Page 35 and 36: Parameter layers©Disney Enterprise
Page 37 and 38: Look development• Simplified mate
Page 39 and 40: Future Work©Disney Enterprises, In
Page 41 and 42: In the course notes• Additional o

Physically-Based Shading at Disney

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