IOR to Reflectance

  • Where to find it:

    • Add Adjustment Layer / Extension Pack / Specular / 

    • NodeGraph / Right Mouse Click / Nodes / Filter / Extension Pack / Specular / 

IOR to Reflectance will convert an IOR value to a Surface Reflectance Value.

For example an IOR or 1.5 equals a reflectance value of 0.04 or 4% reflectance.

This can be useful if you are working with specular reflectance maps in your shaders and only

have access to a surface's IOR Value (for example from various Internet resources such as


Node Overview

Node Ports

  • IOR

When the Manual Input option of the node is disabled you can feed in values from other layers or nodes

that will then be converted.

Node Properties


Manual Input

  • Manual Input

When ticked, the Node will no longer act as an adjustment layer, converting values fed in from other nodes

or layers. Instead it will output the converted value from the IOR Value entered via the Slider.

  • IOR Value

The IOR Value to convert when Manual Input is enabled