Overview

A nude version of my other macromastia LoRA.

The model is pretty straight forward. Use the trigger early in your prompt. Further descriptions to the breasts position, framing and focus can help a lot to emphasize the effect.

Sometimes it creates thicker or chubby bodies, for that you can include descriptors like slim or skinny or use negative prompts.

Values over 1.0 may produce heavy artifacts. Decrease strength if you encounter artifacts. Most samples use a strength of 0.9.

For more, have a look at the example images/videos.

LTXV 2.3 (Sulphur 2) - V1

Coming in July...

Krea 2 Turbo - V1

Use the trigger mcrmst and describe the breast/cleavage in some detail. Use the WAN 2.1 VAE for more realistic outcomes. Use the filter bypass LoRA for better results.

Training model: Krea 2 Turbo + Training Adapter
LoRA strength: 0.5-1.0
Sampler: euler / euler a / euler+beta57
Steps: 8+
VAE: WAN 2.1

mcrmst, A photograph of a woman with gigantic breasts lying on her side on a bed, her massive, round chest prominently displayed. She has long, wavy blonde hair and looks directly at the viewer with a calm expression. The background features a dimly lit bedroom.

Ideogram 4 - V1

Experimental model. Things break and body horror may occur.

Trained on bounding boxes and JSON, but can be used without JSON structure prompts. Use the trigger gigantic breasts on a bounding box that should represent the woman's breasts. This way, the size and position can sort of be controlled.

Training model: Ideogram 4 fp8
LoRA strength conditional: 0.7-1.0
LoRA strength unconditional: 0.3-0.5
Sampler: euler / euler a
Steps: 20+
CFG: 3.0-6.0

{...} // have a look at the showcase prompts

WAN 2.2 T2V - V1

After using the trigger macromastia, use additional triggers large, huge and gigantic to control the size further, see example video. Can be combined with Thiccification.

Training model: WAN 2.2 T2V
LoRA strength: 0.3-1.0
Sampler: euler / euler a
Use TripleKSampler with 1/4/4 steps or no lightning LoRAs at all for quality.
Use breast physics LoRAs to improve jiggle and motion for very large breasts. I highly recommend Huge Natural Breasts Physics at strength 0.3-0.5 for the high noise, no low noise needed or it will degrade texture quality.

A video of a topless woman with macromastia is lying in bed, wearing just panties. She has huge breasts. View from above, she's grabbing her breasts.

Flux.2 [klein] 9B - V1

This is a POC. Anatomy can get really messed up and multiple tries may be required. Experiment with seed and strength, as well as detailed descriptions. A higher quality update coming soon.

Training model: Flux.2 [klein] Base 9B
LoRA strength: 0.3-1.0
Sampler: euler / DPM++ 2M / DPM++ 3M SDE
Steps: 4+
CFG: 1.0 (up to 5.0 with base model)

A POV image of a completely naked woman with gigantic breasts lying on a bed. The woman is nude and uncovered, looking at the camera from a slightly low angle, moaning intimately. Her belly button visible. Warm cozy bedroom setting.

Z-Image (base) - V1

This model may also work with Z Image Turbo on higher strengths (1.0-2.0). You can also give Z Image Distilled a try.

After using the trigger macromastia, use additional triggers large, huge and gigantic to control the size further.

Experimenting with negative prompts and strengths can be very rewarding.

Training model: Z Image
LoRA strength: 0.3-1.0 (up to 2.0 on Turbo)
Sampler: res_2s+beta57 / euler / res_multistep / DPM++ 3M SDE
Steps: 40+ (8+ on Turbo)
CFG: 3.0-5.0 (1.0 on Turbo)

A photo of a naked woman with macromastia sitting in the bathtub. She has absolutely gigantic breasts and full lips. Water in the tub, her body partially submerged in water, bubble bath. Wet hair and shiny skin.

Z-Image Turbo - V1

Not compatible with Z Image Base.

Training model: Z Image De-Turbo
LoRA strength: 0.3-1.0
Sampler: euler / res_multistep / DPM++ 3M SDE
Steps: 8+
CFG: 1.0

Prompt example:

A photo of a topless woman with gigantic breasts is lying on her back in bed. She is taking a selfie with her arms extended towards the camera, her breasts covering part of her face and a significant part her torso. Her breasts are extremely round and massive. Focus on her breasts.

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