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title: "Raw Refraction Filter"
canonical: "https://documentation.chaos.com/space/VMAYA/111739306/Raw%20Refraction%20Filter"
format: markdown
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This page gives some basic details about the Raw Refraction Filter Render Element and how it is used in compositing.

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

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## **Parameters**

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##   
**Usage Notes**

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The **Raw Refraction Filter** Render Element is useful when a precise mask is needed for refractive objects. Unlike the [Refraction Filter Render Element](https://docs-chaos.atlassian.net/wiki/spaces/VMAYA/pages/111739807), there is no need to clip or readjust values when pure black or white is required for the composite.


## **Notes**

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- To properly calculate the refraction information in the **Raw Refraction Filter**, [Refraction Filter](https://docs-chaos.atlassian.net/wiki/spaces/VMAYA/pages/111739807), and [Raw Refraction](https://docs-chaos.atlassian.net/wiki/spaces/VMAYA/pages/111739209) Render Elements, the [Refraction Render Element](https://docs-chaos.atlassian.net/wiki/spaces/VMAYA/pages/111738925) 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.