>>2373
>Seriously, if it weren't AI, I'd say you're no doubt among the top 3 or 4 greatest guro artists out there!
Far from it but that's a nice compliment, thanks
I actually have an artist background which helps a lot with guided inpaint and manual corrections, although inpaint sketching only needs very simple shapes to work.

>I hope I get to request a pic or two, before the burnout strikes you.
You can go ahead, I'm open to the challenge, although the last 2 requests kicked my ass. Too many characters

>no matter what prompt, what neg prompt, denoise and cfg, controlnet or not, the AI tried to transform the arm into a whole upper body of a gay af looking dude. The only way to have it inpaint the arm into just another arm with any pony model I tried was to switch from masked_only to whole_image, of course with undesireable blurry results. Even if the prompt was just "arm" (after the usual score_9-etc-string) and the neg prompt was just source_pony, source_furry. Putting all body parts except for an arm, and all kinds of related words in the neg did not help either. Had to use SD 1.5 just for the arm in the end.

Don't try to invent the arm out of existence. That requires very high denoise and will add a whole character most of the time.
Erasing the whole prompt like you did is the right idea for precision inpaint, although you'd want "holding" rather than "arm" for that specific case.
Inpaint is best done guided, as seen here >>2244 Notice how I inpainted a severed uterus with ovaries despite the almost non existent data in the model and loras. You want that to keep the denoise mid-low and avoid genning full bodies.
I suggest 0.3-0.5 on Euler or 0.4-0.6 on Karras. Karras is best for refining detail because it renoises and denoises progressively, while Euler is good for re-compositing shapes because it re-noises hard once at the start and then denoises from there. Euler shows better sharp detail if what you're inpainting is part of the model and loras being used.

If you can't paint at all what I'd suggest is you don't delete your garbage gens. Using parts of other gens by cropping and copypasting works even better than hand painting. So if you see a gen with a nice bit, keep it around for collaging.

>Have you encountered this kind of behaviour? Any idea what causes it?
High denoise, as mentioned above. But can also help yourself by using soft inpaint and being mindful of your inpaint edges. For example, if you need fingertips corrected (I personally correct them manually, but to give a dumb example) it's better to select the whole hand, or even the arm.
Consider inpaint won't be able to tell what's outside the inpaint area. If you give it a small part without context it gets confused and may yolo it as something else, so feed it stuff it can easily recognize.
After you're done you can recover the original sections by compositing:
Go to your graphic editor of choice, put the original on one layer and the inpainted version on the one above, then erase with a soft brush.
This compositing method is very useful when generating very gacha things, since you can recompose a flawless image from all the separately good bits you generate.

Another good basic thing to do is to control the pixel quota by eyeballing the dimensions of your inpaint area. don't just always use 1024x1024, if it's a tall rectangle you may get better and sharper results with something like 768x1536.