A LoRA to improve the appearance of nipples, though you may like it for the tendency to produce smaller breasts. It's not perfect, but it offers an improvement. Sometimes "perfect nipples" helps improve the output.
Version 2 offers:
Improved nipple clarity and definition
In closeups, areola wrinkles may appear
Improved lighting
More natural skin tones
Improvement in genital definition.
Note: this LoRA is not intended for gross or graphic depiction of genitalia. CivitAI has plenty of LoRAs for that purpose. My overall intention is to produce better breast and nipple appearance than the models supply.
Description
Anecdotally, Z-Image Base rarely understands or reliably implement "flat-chest" prompts. The model tends to produce consistent, average, or larger-proportioned, feminine, East Asian-style figures, often ignoring, or struggling to render, prompts for thinner, slighter, or flat-chested body types. It might help to include negative prompts such as busty, fat-tits, chesty. Experiment.