Some of the parameters are available only in Advanced mode.
Scale – Additionally scales the subsurface scattering radius. Normally, Subsurface Scattering takes the scene project units into account when calculating the subsurface scattering effect. However, if the scene project was not modeled to scale, this parameter can be used to adjust the effect.For more information, see the Scale example below.
Index of Refraction – Specifies the index of refraction for the material. Most water-based materials like skin have IOR of about 1.3.
Overall Color – Controls the overall coloration for the material. This color serves as a filter for both the diffuse and the sub-surface component.
Opacity – Specifies how opaque or transparent the material is.
