bubble_butt SDXL/ZIT

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About this version

Just a quick bubble butt lora on the new Z-image architecture. Ill do a full lora when the base model comes out, but I couldn't resist trying it out before then.

Pretty happy with results. Didn't require any tinkering. But I did need to use the ai-toolkit lora adapter to get stable results.

Same dataset as the last.

Training Details:

train_text_encoder: false

type: "lora"
linear: 16
linear_alpha: 16
conv: 8
conv_alpha: 8
caption_dropout_rate: 0.1
resolution: [ 768, 1024 ]
flip_x: true
batch_size: 1
gradient_accumulation: 8
optimizer: "adamw8bit"
lr: 4e-4
dtype: "bf16"

Model description

This LoRA generates bubble butts for a number of SDXL models. Its nearly the same dataset as my SD1x bubble butt but with a handful of larger sizes added, and better tagging.

Use the tag "bubble butt", with (optionally) one of the following size tags "medium ass", "big ass", "huge ass", "gigantic ass", "hyper butt" along with similar Hyperfusion tags.

If you want front facing images try "from front", or "ass visible from front" and negative "from behind, looking back, ass focus" at varying weights.

v4 WAI_IL Changelog:

No changes, just re-trained on WAI_IL-v14 because I was in a tinkering mood.

v4 noobai_vpred Changelog:

Not much changed. Added a few more images/captions/tags, and trained on noobAI_vpred_1.0 with somewhat similar settings to v3
Same tags as v3, you already know what to expect
"hyper butt" has a greater effect on this noob_vpred version as well if you want it really large.

Images made by this model

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Model Type	LORA
Base Model	ZImageTurbo
Published	12/3/2025
Trained Words	bubble butt