Image Synthesis Class

Homework 10:

Implement the Ashikhmin-Shirley BRDF model described in the JGT paper "An Anisotropic Phong BRDF Model". I render a bunch of spheres in the Cornell Box to display the results.

NOTE: All images are gamma corrected with gamma 2.

A comparison between the BRDF (left,
nu=nv=5) and a Lambertian material.

The same scene except with
backlighting on the spheres.

All surfaces except the light and glass
plate use this BRDF model (with
different parameters). 4096 samples

Comparison Between Different nu and nv Values:

Note that these images all have only specular components in the BRDF (no diffuse).

nu = 10
nu = 100
nu = 1000
nv = 10
nv = 100
nv = 1000

Last Modified: Friday, Nov 2, 2001

Chris Wyman (