I don't know what to call this so I'm calling it a breast rim. I have made a few adjustments to V3's breasts and I can't get rid of the "rim" around the base of them. I haven't done anything extreme with them. Her full body dials are turned up slightly (a bit of young, faerie, voluptuous, skinny, muscular, only 0.1-0.3 on each).

The image has the rim coloured red on the left, and is made obvious by the shadow on the right, just so you know what I'm talking about.

Any suggestions on how to smooth this out to give nice rounded hemispheres?