TipScattering may be improved by adjusting
the Ray Depth Limit in the Attribute
Editor for the LightShape node. Try a Ray
Depth Limit value of 2. For more information, see
Shadow attributes.
Limitations
Currently,
scattering is not supported for instances or shading groups.
Scattering
is not supported across non-continuous surfaces, like adjacent NURBS
surfaces. Each surface can have scattering, but they are considered distinct.