1. CS348B Lecture 17Pat Hanrahan, Spring 2005 Reflection Models Previous lecture Phong model Microfacet models Gaussian height field on surface Self-shadowing Torrance-Sparrow Model Today Multiple importance sampling Anisotropic reflection models

2. Multiple Importance Sampling

3. CS348B Lecture 17Pat Hanrahan, Spring 2005 Multiple Importance Sampling Reflection of a circular light source by a rough surface Radius Shininess Sampling the light sourceSampling the BRDF

4. CS348B Lecture 17Pat Hanrahan, Spring 2005 Multiple Importance Sampling Two sampling techniques Form weighted combination of samples The balance heuristic

5. CS348B Lecture 17Pat Hanrahan, Spring 2005 Multiple Importance Sampling Source: Veach and Guibas

6. Anisotropic Reflection Model

7. CS348B Lecture 17Pat Hanrahan, Spring 2005 Anisotropic Reflection

8. CS348B Lecture 17Pat Hanrahan, Spring 2005 Quarterhorse

9. CS348B Lecture 17Pat Hanrahan, Spring 2005 Reflection from a Cylinder

10. CS348B Lecture 17Pat Hanrahan, Spring 2005 Reflection from a Cylinder

11. CS348B Lecture 17Pat Hanrahan, Spring 2005 Reflection from a Cylinder

12. CS348B Lecture 17Pat Hanrahan, Spring 2005 Reflection from a Cylinder

13. CS348B Lecture 17Pat Hanrahan, Spring 2005 Reflection from a Cylinder

14. CS348B Lecture 17Pat Hanrahan, Spring 2005 Anisotropic Reflection

15. CS348B Lecture 17Pat Hanrahan, Spring 2005 Shape of Anisotropic Highlights From Lu, Koenderink, Kappers Fibers tangent to the plane defined by the halfway vector reflect light

16. CS348B Lecture 17Pat Hanrahan, Spring 2005 Shape of Anisotropic Highlights From Lu, Koenderink, Kappers

17. CS348B Lecture 17Pat Hanrahan, Spring 2005 Kajiya-Kay Model Diffuse Specular

18. CS348B Lecture 17Pat Hanrahan, Spring 2005 Herbert

19. CS348B Lecture 17Pat Hanrahan, Spring 2005 Fiber Model

20. CS348B Lecture 17Pat Hanrahan, Spring 2005 Fiber Model

21. CS348B Lecture 17Pat Hanrahan, Spring 2005 Fiber Model

22. CS348B Lecture 17Pat Hanrahan, Spring 2005 Caustics

23. CS348B Lecture 17Pat Hanrahan, Spring 2005 Hair Appearance

24. CS348B Lecture 17Pat Hanrahan, Spring 2005 Hair Appearance

26. CS348B Lecture 17Pat Hanrahan, Spring 2005

27. CS348B Lecture 17Pat Hanrahan, Spring 2005