Rasagar/Library/PackageCache/com.unity.render-pipelines.high-definition/Documentation~/snippets/shader-properties/advanced-options/use-light-facing-normal.md

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<td><strong>Use Light Facing Normal</strong></td>
<td>Indicates whether or not hair normals always appear to face towards light sources in the Scene. This mimics the behavior of real-world hair.</td>
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