Robert L. Cook, Kenneth E. Torrance
A new reflectance model for rendering computer sythesized images is presented.
The model accounts for the relative brightness of different materials and
light sources in the same scene. It describes the directional distribution
of the reflected light and a color shift that occurs as the reflectance
changes with incidence angle. A method for obtaining the spectral energy
distribution of the light relfected from an object made of a specific real
material is presented, and a procedure for accurately reproducing the color
associated with the spectral energy distribution is discussed. The model is
applied to the simulation of a metal and a plastic.
Published in Transactions on Graphics, Vol. 1, No. 1, January 1982.