Advanced Options - Arnold User Guide

Specular in Secondary Rays

By default 'Specular in Secondary Rays' is disabled, so for diffuse and glossy rays, the Skin shader evalutes the SSS layers only. This makes the shader faster to render. When 'Specular in Secondary Rays' is enabled, the Skin shader evalutes the Specular layers as well as the SSS layers for diffuse and glossy rays.

Sample SSS only in Indirect Specular Rays: Off	Sample SSS only in Indirect Specular Rays: On

Fresnel Affect SSS

Determines whether fresnel computations affect SSS. It is recommended that this should be left on by default.

Enabled	Disabled