V-Ray Fresnel is a simple texture map that blends two colors or maps based on the viewing angle and an index of refraction. For example, you can connect the Fresnel texture to the reflection color of a V-Ray material in order to create fresnel reflection.
Front Color – The color for the texture when viewed frontally (refraction color).
Side Color– The color for the texture when viewed at a grazing angle (reflection color).
Fresnel IOR– Index of refraction to use when calculating the Fresnel term.
Refract IOR – Specifies the refraction IOR for the underlying surface. This is ignored if the surface has a volume shader (the volume IOR is used instead).
Contribute to Fresnel IOR Render Element – When enabled, the V-Ray Fresnel Texture contributes to the Fresnel IOR Render Element.
