matchvex_blinn VEX function

Context: surface

See also: blinn, Writing a PBR shader

  1. bsdf matchvex_blinn(float exponent)

  2. bsdf matchvex_blinn(vector nml, float exponent)

The BSDF produced by blinn is not the same as the traditional VEX blinn() output. Use this function to produce a closer approximate match to the traditional VEX blinn().