Table of Contents

This page provides information about the Reflection IOR Render Element in V-Ray for Cinema 4D.


The Reflection Index Render Element returns an image with floating-point values corresponding to the Fresnel IOR values of scene objects' materials.

This render element can be used to enhance or reduce Fresnel IOR effects in the final composite. Note that the values generated in this render element can often be above 1 so that the image may appear to just be black and white. Sampling the pixel values in the white areas returns the precise floating-point values stored, which represent the Fresnel IOR numbers for the rendered object.

Examples of materials that have Fresnel IOR parameters that could be represented in this render element are V-Ray Material (VRayMtl).

UI Path: ||V-Ray|| > Render Elements > Reflection IOR

How to add a render element to a scene


Enable Deep Output – Specifies whether to include this render element in deep images.

Filtering –  Applies an image filter to this channel.

Was this helpful?