Fresnel

What is it about?

This page covers the Fresnel node of the Redshift renderer in Cinema 4D. It outputs a color weighted by viewing angle — strongest at grazing angles — for custom rim effects, angle-dependent ramps and manual reflectivity control.

This shader node computes a Fresnel effect weighted color. The Fresnel effect determines how the reflectivity of a surface changes when an incident ray is parallel vs perpendicular to the surface normal, with the reflectivity being strongest when perpendicular. This node is useful for effects such as controlling color ramps that change with viewing angle or blending material reflection layers in a physically correct way.