25 lines
1.7 KiB
Markdown
25 lines
1.7 KiB
Markdown
# Ray-Traced Ambient Occlusion
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Ray-Traced Ambient Occlusion is a ray tracing feature in the High Definition Render Pipeline (HDRP). It is an alternative to HDRP's screen space ambient occlusion, with a more accurate ray-traced solution that can use off-screen data.
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**Screen space ambient occlusion**
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**Ray-traced ambient occlusion**
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For information about ray tracing in HDRP, and how to set up your HDRP Project to support ray tracing, see [Getting started with ray tracing](Ray-Tracing-Getting-Started.md).
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## Using Ray-Traced Ambient Occlusion
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Because this feature is an alternative to the [Ambient Occlusion](Override-Ambient-Occlusion.md) Volume Override, the initial setup is very similar. To setup ray traced ambient occlusion, first follow the [Enabling Ambient Occlusion](Override-Ambient-Occlusion.md#enabling-ambient-occlusion) and [Using Ambient Occlusion](Override-Ambient-Occlusion.md#using-ambient-occlusion) steps. After you setup the Ambient Occlusion override, to make it use ray tracing:
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1. In the Frame Settings for your Cameras, enable **Ray Tracing**.
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2. Select the [Ambient Occlusion](Override-Ambient-Occlusion.md) override and, in the Inspector, enable **Ray Tracing**. If you do not see a **Ray Tracing** option, make sure your HDRP Project supports ray tracing. For information on setting up ray tracing in HDRP, see [Getting started with ray tracing](Ray-Tracing-Getting-Started.md).
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## Properties
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HDRP implements ray-traced ambient occlusion on top of the Ambient Occlusion override. For information on the properties that control this effect, see [Ray-traced properties](Override-Ambient-Occlusion.md#ray-traced).
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