Rasagar/Library/PackageCache/com.unity.render-pipelines.high-definition/Documentation~/path-tracing-setup.md

Setup path tracing

Path tracing shares the general requirements and setup as other ray tracing effects, so for information on hardware requirements and set up, see getting started with ray tracing. You must carry out this setup before you can add path tracing to your Scene.

Add path tracing to a scene

Path tracing uses the Volume framework, so to enable this feature, and modify its properties, you must add a Path Tracing override to a Volume in your Scene. To do this:

1. In the Scene or Hierarchy view, select a GameObject that contains a Volume component to view it in the Inspector.
2. In the Inspector, select Add Override > Ray Tracing > Path Tracing.
3. In the Inspector for the Path Tracing Volume Override, set State to Enabled. If you don't see State, make sure your HDRP Project supports ray tracing. For information on setting up ray tracing in HDRP, see getting started with ray tracing. This switches HDRP to path-traced rendering and you should initially see a noisy image that converges towards a clean result.
4. If the image doesn't converge over time, select the drop-down next to the effect toggle and enable Always Refresh.

Properties

For information about path tracing properties, refer to Path tracing reference.