blinn

bsdf  blinn(float exponent, ...)

bsdf  blinn(vector nml, float exponent, ...)

Returns a Blinn BSDF.

See writing a PBR shader for information on BSDFs.

vector  blinn(vector nml, vector V, float roughness, ...)

Computes Blinn shading.

nml

The normal of the surface to use for evaluate.

V

The incidence vector.

exponent

The exponent value. The higher the value, the tighter the specular lobe.

Each of the functions can also take an optional light mask.