this post was submitted on 09 Jul 2023
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Stable Diffusion

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What's the best way to upscale drawings/illustrations/paintings? (self.stable_diffusion)
submitted 1 year ago by guriinii to c/[email protected]
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I'm pretty new at this but loving it. I've been messing around with illustrations, ink art, sketches and watercolours, which has stunning results. The default upscalers create a smooth texture, sort of 3d and a bit photo realistic, and it just looks weird.

And where do I find and install upscalers?

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[–] dangerno8 2 points 1 year ago

After refining to 2048px with img2img I usually send it to extras and upscale to 4096px with 4x-UltraSharp but for the most natural looking result I will just scale the 2048px image up in photoshop and then overlay the UltraSharp output somewhere between 40-70% opacity. But then it also depends on the style of the image, for some images that I really want to look their best I'll do both UltraSharp and R-ESRGAN-x4+_anime_6B and then mask out the areas I find to look best between the two in order to get the fewest artifacts. Maximum sharpness isn't always the best, some mild blur and even film grain/noise can do a lot to make an image look really natural and beautiful.