Use it as a reference to dial a look in in daz, just trying to get the eye nose and mouth height and width in the right place (eyes and nostrils are the most important bit).
Then set the Genesis 2 Female you shaped to
Base geometry and export as obj. I export at 1% scale.
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Import into Blender and put your sculpt over the top,
Then in sculpt mode shape the Genesis figure to match. Don't add or remove any Vertices, just grab and smooth the model so its flush with the surface of your head sculpt. be careful around the eyes and nostrils. Then export as obj
Back in Daz, open morph loader pro, it is in the edit -figure tab. Set the import scale to 10000%, (because you exported at 1%) and click "Choose Morph files..."
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Click accept and your morph will show up in the perameters tab, under morph loader. Set it to 100% and save the morph as a support asset/morph asset, making a note of where it saves it.
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Then drop that .dsf file into you main Vam folder in Custom/atom/person/Morphs/Female, and it will show up in female morphs next time you start vam.
Good Luck