After overlaying all of the images, I do mathematically see a difference. It is subtle and it is there. So since the OP wanted just the wall changed and its color was probably not important, I just overlayed the two images and masked in just psleon's great fixes on the wall and left the rest of the original image alone and also made sure the Color Space was tagged the same way it came in as Display P3. Hopefully that gives the desired end result. The image is attached below.
Now tracking down the source of the problem may be difficult yet if it was a Color Management issue here are some steps to avoid
- Bring the image into PS with an embedded color profile (submitter has to make sure that is the case and in this case the incoming Color Profile was Display P3
- Preserve that color profile and edit in the embedded color profile space (in this case again Display P3)
- When done, save the image out with the same original Color Space
With the above steps, there is no conversion in the software from one Color Space to another which can include changes of black point as well
Again, the differences were subtle yet do show that there were some changes. Just might be hard at this point to track down the source.
John Wheeler