Schlick's approximation

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In 3D computer graphics, Schlick's approximation is a formula for approximating the BRDF of metallic surfaces. It was proposed by Christophe Schlick to approximate the contributions of Fresnel terms in the specular reflection of light from conducting surfaces.

According to Schlick's model, the specular reflection coefficient R is given by

where θ is the incident angle (which equals the reflected angle for specular reflection) and R₀ is the reflectance at normal incidence.

[edit] See also

• Phong reflection model
• Blinn-Phong shading model
• Fresnel equations

[edit] References

Christophe Schlick (1994). "An inexpensive BRDF model for physically-based rendering". Computer Graphics Forum 13 (3): 233–246. doi:10.1111/1467-8659.1330233.