RPR_MATERIAL_NODE_FRESNEL

Usage

Fresnel term, used for weighting blend between diffuse and specular BRDFs, or more generally, outputs the Fresnel falloff on edges facing away from the camera on geometry.

Parameters

Input	Name	Type and Range	Brief Explanation
RPR_MATERIAL_INPUT_INVEC	invec	Vector	Direction (usually view direction).
RPR_MATERIAL_INPUT_NORMAL	normal	Vector	Surface normal direction.
RPR_MATERIAL_INPUT_IOR	ior	Float	Index of refraction, controls falloff towards edges.
RPR_MATERIAL_INPUT_SCHLICK_APPROXIMATION	schlickapprox	Float	Schlick factor.