Its works on txt2img, but it sucks, i dont gonna lie xd
Lora Weight 0.8-1
Stable Diffusion works pretty bad with small things, so I recommend that you upscale the image first and then edit it in the Inpaint tool, in case you can't due to GPU limitations, I highly recommend using the After Detailer extension (ADetailer). With it you can make images directly in the txt2img, just play with the weight of the Lora (0.75 is the minimum that still makes a decent "byakugan").(If your ADetailer doesn't work in img2img, here is a little guide to make it work)
1- Go to your Stable Diffusion directory, there look for the extensions folder>adetailer>scripts> and there you edit a file named !adetailer
((E:\STD\ForgeUI\webui\extensions\adetailer\scripts\!adetailer.py))
2- Once inside, using CTRL + F you normally do a quick search, look for a paragraph named (( def is_img2img_inpaint )).
3- And now just add a # and a return False line and you are done.
@staticmethod
def is_img2img_inpaint(p) -> bool:
# return hasattr(p, "image_mask") and bool(p.image_mask)
return False
4- Save the change and restart your Stable Diffusion.