This is the model used when making lora.

https://civarchive.com/models/232545/badbro31

Irezumi lora, a Japanese yakuza tattoo

However, it still only works in limited circumstances.

It was trained with 640*640.

It was confirmed that it works well in 640*768 full body shot.

Since it is unstable, I share the settings I tested.

Sampler: ++sde karras

steps : 40

upscale step :30

640*768

CFG: 20

use After Detailer

use DT

usefull prompt: <lora:badbroIrezumi:0.8>, tattoo, Irezumi, (full body:1.5), (wide shot:1.3), (depth in field:1.3), (simple white background:1.3)