Have you recognized txt2imghd?

[HoneyCodeBadger]

Maybe it`s worth, getting this idea into this project.

https://github.com/jquesnelle/txt2imghd

Then you don't have to take care how to upscale propperly anymore.
Sometimes you want to turn your playing clean into a beautiful wallpaper without a diversion.
However, if there is an out of the box method that I have simply overlooked, I would be grateful for a tip. I've only been working my way through the many parameters for a few days.

PS: Many thanks to all who have already contributed here. It's just unbelievably amazing.

[kybercore]

This is the SD upscale script on img2img. It works the same, you just supply an init image which is also an option in txt2imghd, preventing bad generations at high resolution by allowing you to sort them out at lower resolution. Go with a denoising strength of < 0.33 and SD set the resolution to 512*512. Chose SWINIR as an upscaler, or BSRGAN, and for euler a try 100 steps.

Alternatively set the medvram or lowvram flag if necessary and use high res fix txt2img (e. g. initial size 512640, regular size 10241280, denoising strength 0.45 to 0.6)

[Eleksar387]

It's unclear to me when I would use the SD upscalet script and when I would use upscaling in the extras tab. Can anyone explain please?

[HoneyCodeBadger]

Awsome! This was an perfect example why I love the open source community. Now there is my first stunning wallpaper in place. Many thanks!

Edit: After some tests I was able to start from 640x512, then outpaint to1024x512 and finally scale up to 8192 x 4096. :)