How can I change part of the background while keeping the chiaroscuro?

Question

Image processing

There is a picture of the interior. You need to resize the image, which creates bare areas that can't be filled with just a content-aware fill because the background pattern is complex.
The question arises: how to change the background to a simpler one while maintaining the chiaroscuro of the previous background?
I am attaching the image. Please describe the process in detail, because skins are missing.
https://static-sl.insales.ru/images/products/1/756...

Answer 1

Theoretically, since the wallpaper has a regular repeating pattern, you can use this knowledge and restore the chiaroscuro map by subtracting (or dividing) it ...
i.e. select the repeating wallpaper pattern, multiply it on a separate layer, adjusting the distortions, if any, so that they coincide with the current image along the contours (manually this is real, albeit dreary, well you have one wall even, without bends).
Another layer is a mask where there is wallpaper and where there are interior elements and photos on the wall.
Then divide it by the original of your pattern layer, get a shadow map, you need to blur it or somehow eliminate the garbage of mismatches and glitches, maybe manually too?
Then take your new wallpaper as a pattern, do exactly the same things (distort) you did for your first wallpaper, get the wallpaper layer to replace, subtract the mask from it, then multiply by your shadow map layer, maybe through the mask again and overlay on top of the original