---
title: "VRayRefractionFilter"
canonical: "https://documentation.chaos.com/space/VMAX/113575265/VRayRefractionFilter"
format: markdown
---
<span style="color: #000000">This page gives some basic details about the Refraction Filter Render Element and how it is used in compositing.</span> <span style="color: #000000"> </span>


## **Overview**

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## <span style="color: #000000">**Parameters**</span>

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<span style="color: #000000"> </span>

## **Common Uses**

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The **Refraction Filter Render Element** is useful for changing the appearance of refractive elements, after rendering, in a compositing or image editing application. In the example, the refractions are brightened and tinted using the Refraction Filter RE. See the render before and after compositing.

## <span style="color: #000000">**Underlying Compositing Equation**</span>

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<span style="color: #000000">The Refraction Filter Render Element is multiplied by the Raw Refraction to produce the same information seen in the Refraction pass, but having them separated allows them to be manipulated individually before combining them together. This allows for greater control over the final image. </span>


[VRayRawRefraction](https://docs-chaos.atlassian.net/wiki/spaces/VMAX/pages/113575267) x VRayRefractionFilter = [VRayRefraction](https://docs-chaos.atlassian.net/wiki/spaces/VMAX/pages/113575263)

![image](media://f38e89d8-0140-42cb-a031-4da0af68d69c)


## **Notes**

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- To properly calculate the refraction information in the Refraction Filter, [Raw Refraction](https://docs-chaos.atlassian.net/wiki/spaces/VMAX/pages/113575267), and [Raw Refraction Filter](https://docs-chaos.atlassian.net/wiki/spaces/VMAX/pages/113575303) Render Elements, the [Refraction Render Element](https://docs-chaos.atlassian.net/wiki/spaces/VMAX/pages/113575263) must also be rendered at the same time, even if it's not going to be used in the compositing process. Doing so enables all the refraction information to be included in the rendering calculations.