2026-02-04: Check out the latest Z-Image Gigantic Breasts model at the link below:
https://civarchive.com/models/2361123/zib-gigantic-breast-implants
Z-Image is a lot more robust, especially with LoRAs in picking up core changes without overfitting everything else, so I think there will be better results with Z-Image if you aren't looking for overly explicit, uncensored NSFW results.
Provides huge fake breasts with a good mix of nude, sexual attire and fully clothed data so those clothes are realistically stretched to their limits
While this is trained on realistic images, I have had some pretty good results on anime characters as long as you add 'realistic' into the negative prompt.
The primary tags are:
gigantic breasts
huge implants
Note - using these and applying both with the same prompt strength gives breasts the size and shape of rounded breasts and fine-detail.
If the breasts are drooping too low, you can also add 'sagging breasts' to the negative prompt.
There is one additional tag that has alot of trained data applied
breast overhang
Using this prompt, while not always occuring will make the shirt/dress loosely drape downwards from the breasts rather than puckering up underneath them