Rasagar/Library/PackageCache/com.unity.render-pipelines.high-definition/Documentation~/snippets/shader-properties/advanced-options/scattering-mode.md

Scattering Mode Indicates the light scattering method in a volume of hair. Requires the Physical Material Type and Strands Geometry Type to use:
• Approximate: Fall back to a simplified diffuse component to approximate hair color. This is generally acceptable for high-absorbent (dark) hair. This is the default for both Material types.
• Advanced: Simulate the scattering of light through a volume of hair strands. This is important for depicting low-absorbent (light) hair. Adds the Strand Probe Volume parameter.