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

Multiple Importance Sampling

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

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

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

Anisotropic Reflection Model

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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