Overview

The Surface Tangent node has one purpose, to control the direction of anisotropic reflections when connected to an OpenPBR material. The OpenPBR material accepts a Surface Tangent in the Anisotropy Tangent ports for both Specular reflection and Coat reflections.

 

Example Graph

Connect a Surface Tangent to the Anisotropy Tangent in the Specular or Coat inputs of an OpenPBR material.