Shells, also know as geometry shells or geoshells, add color and other properties to the materials of a character. A single shell seldom causes problems, but if we mix multiple shells they can interact with each other in undesired ways. This post describes some shell problems and how to fix them.
I don't know how to solve this problem in DAZ Studio, so we leave it to the Blender side.
If the nipples are solid white, it means that some other shell is also active. Perhaps you forgot to turn off the tears shell on the nipple materials.Oiled Full Body_GP_Torso-1. Replace this node group with the node group for the torso, i.e. Oiled Full Body_Torso-5.
Repeat the procedure for all genitals and nipples materials.
We can increase the oilyness in the same way, or make the skin look dry by turning down the oily shell influence to zero. However, this becomes quite cumbersome since there are many materials that have the oily shell group, and the change has to be made to all of them. Fortunately, there is a way to change the influence for all materials at once.