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This is a bipolar slider for IllustriousXL. 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 results in smaller breasts.

What makes this slider special is that it is largely decoupled from age. Making a breast size slider is not hard, making a breast size slider that doesn't overly influence age is hard. This slider does the best that modern tools allow for decoupling age from breast size, and in my opinion it does a good job at that.

Supported input values are -5 to 5, however weights of 4 or above often yield excessively large breasts. 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 3, you're going to get absolutely massive honkers. For the same prompt, if you prompt flat chest instead and use a LoRA weight of 3, 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:

<lora:StS_IllustXL_Breast_Size_Slider_v1.0:3>, 1girl, solo, (breast focus), from below, head tilt, standing in water, looking at viewer, v, red hair, green eyes, long hair, light blush, grin, competition swimsuit, perspective, (pool), highres, ultra-detailed, illustration, colorful, masterpiece, extremely detailed, 8k, best quality, soft lighting, absurdres, backlighting, lens flare

If you have issues using this LoRA, feel free to send me a message on CivitAI 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.

You can support my work by following me on CivitAI or checking out SeaArt where I also host my models.

Changelog:

January 20, 2025 - Initial v1.0 Release