Working With HD Detail Sliders

I have a question related to the HD options for Genesis 2 figures:
Let’s say I want to dial up the Olympia Head HD Details, but I don't want the effect to apply to some parts of the face (for example, her ears or nose—whatever). Is there a way I can mask or protect specific parts of the HD detail target (in this case the face) from being affected by the slider?
Comments
Based on the lack of replies I'm guessing I either asked something extremely stupid or not possible to do in Studio (or probably both). LOL
I was thinking this might be possible with a geometry shell and applying an opacity mask on the HD shell over a base level morph. I haven't tried it but that is my idea.
I don't think it would work as shell follows underlying geometry
HD morphs are like any morphs either full body or part body, if head, whole head
So far as I remember, you generally get an HD morphing dial for the body and head. You can apply them to either of those parts, but not specific individual sections.