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title: "Raw Refraction"
canonical: "https://documentation.chaos.com/space/VRAYHOUDINI/113281118/Raw%20Refraction"
format: markdown
---
This page gives some basic details about the Raw Refraction Render Element and how it is used in compositing.


## **Overview**  


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## **Attributes**

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> ℹ️ This render element is not supported with V-Ray GPU rendering.


## **Common Uses**

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The Raw Refraction Render Element is useful for changing the appearance of refractive elements of a complete render inside a compositing or image editing application. For this example, the Raw Refraction RE and the [Refraction Filter](https://docs-chaos.atlassian.net/wiki/spaces/VRAYHOUDINI/pages/113281117) RE are used to tint and brighten the refractive materials in the scene. See how the render looks before and after compositing.


## **Underlying Compositing Equation**

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Raw Refraction x [Refraction Filter](https://docs-chaos.atlassian.net/wiki/spaces/VRAYHOUDINI/pages/113281117) = [Refraction](https://docs-chaos.atlassian.net/wiki/spaces/VRAYHOUDINI/pages/113279770)

![image](media://eff45508-e6ed-445f-b569-b00f597e8799)


## **Notes**

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- To properly calculate the refraction information in the Raw Refraction and [Refraction Filter](https://docs-chaos.atlassian.net/wiki/spaces/VRAYHOUDINI/pages/113281117) Render Elements, the [ Refraction ](https://docs-chaos.atlassian.net/wiki/spaces/VRAYHOUDINI/pages/113279770) Render Element 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.
- This render element is not supported with V-Ray GPU rendering.