32 lines
2.2 KiB
Markdown
32 lines
2.2 KiB
Markdown
# Screen Space Refraction override
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Screen space refraction uses the color buffer or Reflection Probes to produce a refraction effect.
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HDRP uses screen space refraction by default if you set a Material's [Surface Type](Surface-Type.md) to **Transparent**. For information about how screen space refraction works in HDRP, or to turn refraction off, see [Refraction in HDRP](Override-Screen-Space-Refraction.md).
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The **Screen Space Refraction** override controls **Screen Weight Distance**, which sets how quickly screen space refractions fades from sampling colors from the color buffer to sampling colors from the next level of the [reflection and refraction hierarchy](how-hdrp-calculates-color-for-reflection-and-refraction.md).
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Increase **Screen Weight Distance** to reduce visible seams on an object between refracted colors from the screen, and refracted colors from probes or the Skybox.
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## Using Screen Weight Distance
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To use this setting, you must enable it on a [Volume](understand-volumes.md), as follows:
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1. In the Scene or Hierarchy view, select a GameObject that contains a Volume component.
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2. In the Inspector for this object, select **Add Override** > **Lighting** > **Screen Space Refraction**.
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<br/>
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In the refractive cube on the left of the screen, **Screen Weight Distance** affects the edges of the screen where HDRP fades from using the color buffer to using Reflection Probes.
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## Properties
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| **Property** | **Description** |
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| ----------------------------- | ------------------------------------------------------------ |
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| **Screen Weight Distance** | Adjust this value to set how quickly HDRP fades from sampling colors from the color buffer to sampling colors from the next level of the [reflection and refraction hierarchy](how-hdrp-calculates-color-for-reflection-and-refraction.md). Use **Screen Weight Distance** to reduce visible seams between refracted colors from the screen, and refracted colors from probes or the Skybox. |
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You can also use the [Volume Scripting API](Volumes-API.md) to change **Screen Weight Distance**.
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## Additional resources
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- [Refraction in HDRP](Override-Screen-Space-Refraction.md)
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