Erect Penis Bulge

This is an alpha version of a LoRA I trained to experiment with LoRA training on Z-Image. It was trained on ~40 images of varying quality, so do not expect excellent generations, but it can produce decent bulges in most cases.

The trigger word is 3r3ctC0ckBulg3, but it can also work without the trigger. You just need to describe the bulge in the prompt, for example:

“A massive, anatomically detailed bulge is clearly visible.”

Sometimes, providing a more detailed description helps, such as:

“A massive, anatomically detailed bulge is clearly visible — the outline of large, rounded testicles and a thick shaft pressed against the underwear, with the lower curve of the testicles and the ridge of the shaft distinctly highlighted.”

It can also help to describe how light interacts with the bulge, for example:

“Sunlight casts sharp highlights and shadows, emphasizing the bulge’s contours, especially the lower curve of the testicles and the shape of the shaft.”
Recommended parameters:

• Sampler: res_2s

• Scheduler: beta57

Known issues:

1. It can only generate bulges for underwear and singlets (see example images).

2. It struggles to add bulges to completely black clothing (likely because it relies on highlights and shadows, which are harder to produce on black fabrics).

3. It may reduce overall image quality; in that case, use a LoRA weight of 0.7–0.9.

4. It appears to generate only cis men with bulges and does not work for trans women.

5. In some cases, the model cannot decide which side the penis is tucked, resulting in a double-bulge / double-shaft artifact. In such cases, explicitly specifying the direction of the curve (e.g., curved to the left or curved to the right) usually fixes the issue (see the image with the man in a singlet).

I hope to find some time in the future to improve the training dataset and address the issues listed above.