Somehow, these things are based off of natural tits. They, admittedly, look like they should be over-zealous enhancements. Like her significant other drunkenly pointed at a picture in a book and said, "Give her those!" right before surgery. But no, the subjects that were used for training can actually be tracked over the years of their careers showing a slow steady growth chart. Primarily trained on Thai subjects, giving us huge tits with dark nipples on top of ghostish areolas. You'll also end up with a navel piercing most likely.
Free DL:
Flux: https://civitai.com/models/1345543?modelVersionId=1519688
Pony: https://civitai.com/models/1345543?modelVersionId=1563901
ILL: https://civitai.com/models/1345543?modelVersionId=1645252