The V-Ray User Color node texture can be used to read user-defined object properties from the current material and convert them to a color value. This allows you to use the same shading network on several different objects in the scene, but to control various aspects of the material through user-defined properties. For more information about Visit the User Attributes Workflow page for information and tutorials on user-defined properties(i.e., User Attributes), see the User Attributes Workflow page.
This texture also has the ability to read mesh color sets, UV sets, and extra channel information from VRayProxy objects.
