Ward material (wrd)

key: wrd

type: CCCC

  1. color: diffuse reflectance.
  2. color: specular reflectance.
  3. color: alpha-x.
  4. color: alpha-y.

Description

An implementation of Greg Ward's model from the SIGGRAPH 92 paper.

BRDF

See the SIGGRAPH 92 paper,
Gregory J. Ward Larson. Measuring and Modeling Anisotropic Reflection, Computer Graphics (Proceedings of SIGGRAPH 92), 26 (2), pp. 265-272 (July 1992, Chicago, Illinois). Edited by Edwin E. Catmull. ISBN 0-201-51585-7.

Examples 

 wrd
    rgb 0.1 0.1 0.1 end
    rgb 0.3 0.3 0.3 end
    sclr 0.09 end
    sclr 0.07 end
 end