Technical Papers

Reflectance: Modeling, Capturing, Renderings

Wednesday, 13 August 2:00 PM - 3:30 PM | Vancouver Convention Centre, East Building, Exhibit Hall A Session Chair: Szymon Rusinkiewicz, Princeton University

genBRDF: Discovering New Analytic BRDFs With Genetic Programming

This paper employs a large-scale genetic programming approach to discover new analytic BRDFs. Results include several mathematical expressions not previously studied in the BRDF literature that give superior fits to measured data.

Jason Lawrence
University of Virginia

Pieter Peers
College of William & Mary

Adam Brady
University of Virginia

Westley Weimer
University of Virginia

Discrete Stochastic Microfacet Models

A modified microfacet BRDF that simulates effects collectively referred to as "glitter" or "sparkle" by treating a surface as being covered by a finite number of point scatterers. It is readily implemented in standard rendering systems and converges back to the smooth case in the limit.

Wenzel Jakob
ETH Zürich

Steve Marschner
Cornell University

Ling-Qi Yan
University of California, Berkeley

Milos Hasan
University of California, Berkeley

Ravi Ramamoorthi
University of California, Berkeley

Jason Lawrence
University of Virginia

Rendering Glints on High-Resolution Normal-Mapped Specular Surfaces

Rendering a complex specular surface under sharp lighting is hopeless using naive pixel sampling: the energy is concentrated in tiny highlights that are missed by uniform sampling. This method computes the true distribution of normals on a surface patch seen through a single pixel, which can be highly complicated.

Ling-Qi Yan
University of California, Berkeley

Milos Hasan
Autodesk, Inc.

Wenzel Jakob
ETH Zürich

Jason Lawrence
University of Virginia

Steve Marschner
Cornell University

Ravi Ramamoorthi
University of California, Berkeley

Reflectance Scanning: Estimating Shading Frame and BRDF with Generalized Linear Light Sources

A generalized linear light-source solution to estimating both local shading frame and surface reflectance of a planar spatially varying material sample.

Guojun Chen
Tianjin University

Yue Dong
Microsoft Research Asia

Pieter Peers
College Of William & Mary

Jiawan Zhang
Tianjin University

Xin Tong
Microsoft Research Asia

A Comprehensive Framework for Rendering Layered Materials

This paper presents a general and practical method for computing BSDFs of layered materials. The approach synthesizes BSDFs for a great variety of layered structures, while correctly accounting for internal scattering. The paper demonstrates the model using an interactive visual design tool that enables easy exploration of the space of layered materials.

Wenzel Jakob
ETH Zürich

Eugene D'Eon
Weta Digital

Otto Jakob
Atelier Otto Jakob

Steve Marschner
Cornell University