...
The values for subsurface scattering use a millimeter scale. This attribute specifies the scale to apply these parameters when the objects are not exported in millimeters. The default value for this attribute is ‘0.1’, since 3Delight for Maya exports the objects in centimeters.
Subsurface Shading Rate
This attribute specifies Specifies the shading rate used for the subsurface simulation. Its default value is ‘1.0’.