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This is a bipolar slider for ANIMA. The purpose of this slider is to increase or decrease the subject's breast size in a controllable fashion with the LoRA input values. Higher positive LoRA input values result in larger breasts. Negative values result in smaller breasts.

What makes this slider special is that it is decoupled from everything except breast size. Making a breast size slider is not hard; making one that doesn't drag age, body weight, height, art style or the camera angle along with it is hard. This slider was successfully trained against all of those!

Supported input values are -2 to 2. Recommended to start around ±1 and go up from there. Please be aware that whatever breast size you prompt (if any) will be the base that the slider works off of. For example, if you prompt huge breasts and then use a LoRA weight of 2, you're going to get absolutely massive honkers. For the same prompt, if you prompt flat chest instead and use a LoRA weight of 2, the breasts will be much smaller than if you used huge breasts. The LoRA slider works like an offset in this regard.

No activation prompt. Example prompt (the showcase images use this style; booru tags work best with Anima):

```

<lora:StS_Breast_Size_Slider_v1.0_ANIMA:1>, masterpiece, best quality, amazing quality, very aesthetic, absurdres, highres, score 9, safe, 1girl, solo, mature female, red hair, long hair, wavy hair, green eyes, looking at viewer, smile, closed mouth, straw hat, sun hat, white dress, sundress, floral print, high collar, short sleeves, standing, straight-on, arms behind back, cowboy shot, outdoors, garden, rose, pink flower, bush, sunlight, day, summer

```

Showcase settings: hosekiLustrousmixAnima v1.0, Euler, Normal, 22 steps, CFG 3, Shift 1, 768x1024 or 1024x1024, Hires 2x with 4x_fatal_Anime_500000_G, 22 hires steps, denoise 0.3. Full parameters are embedded in every example image. For the cleanest slider sweeps, use a non-ancestral sampler (Euler rather than Euler a) and keep the seed fixed.

If you have issues using this LoRA, feel free to leave a comment and I will help you out if I can. If you are running into use cases where this LoRA breaks down and/or freaks out, please let me know so I can fix it for future version releases.

Changelog:

October 28, 2026 - Initial v1.0 Release, early access for TensorArt

Breast Size Slider LoRA | ANIMA - 1.0