>>104684415No img2img, just hires fix. I use denoising from 0.10 to 0.30 depending on how much detail is in the image but usually 0.25 is perfect for me. Like for this picrel I had to lower it to 0,15 or it was putting random things in the background.
What denoising do you use? I'm pretty sure different styles upscale better on different denoise especially with illustrious. Before I used this style I had to go higher than that. 
It's also specific to samplers and what upscaler you use, I experimented with a few and this is giving me the best results so far.