1. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell 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. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Multiple Importance Sampling Reflection of a circular light source by a rough surface Radius Shininess Sampling the light sourceSampling the BRDF

4. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Multiple Importance Sampling Two sampling techniques Form weighted combination of samples The balance heuristic

5. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Multiple Importance Sampling Source: Veach and Guibas

6. Anisotropic Reflection Model

7. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Anisotropic Reflection

8. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Anisotropic Reflection

9. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Quarterhorse

10. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Reflection from a Cylinder

11. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Reflection from a Cylinder

12. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Reflection from a Cylinder

13. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Reflection from a Cylinder

14. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Reflection from a Cylinder

15. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Shape of Anisotropic Highlights From Lu, Koenderink, Kappers Fibers tangent to the plane defined by the halfway vector reflect light

16. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Shape of Anisotropic Highlights From Lu, Koenderink, Kappers

17. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Kajiya-Kay Model Diffuse Specular

18. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Herbert

19. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Fiber Model

20. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Fiber Model

21. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Fiber Model

22. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Caustics

23. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Hair Appearance

24. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell Hair Appearance

26. University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2007 Don Fussell