A part of the wall has been lost using the rotate and perspective module without cropping.
I want to reconstruct with dt the left black triangle. It’s a fill, but not with an uniform colour: I want to reconstruct the part of the wall that is missing, and its colour varies with the distance from the top.
I intend that I must use the retouch module, but I’ve tried and re-tried many times, and I’ve read and re-read the manual many times, without realizing how should I do.
You might be able to get it done using several masks with the retouch module. I would try using Gimp and G’MIC using one of the G’MIC inpaint tools and Gimp’s cloning and/or healing tools instead.
I would initially use the clone option in the retouch tool. It will do a patchy looking job. But then I would use a new instance of the retouch tool and use the healing option. It is then likely to create a smoother looking finish. However, I suspect may have to defer to GIMP to do the really tricky bit near the table. Maybe I would just do the whole thing in GIMP. I use GIMP, not DT for photo restoration.
I don’t know all tools that GIMP may offer.
Anyhow, I solved a similar challenge by first, in GIMP, copying a narrow strip of the graded area closest to the black area that needs to be filled (= vertical strip at the left border of the original image), and pasted in several copies of it beside each other to the left of the original image. Thereby I expanded the left hand side of the image, in a way which maintained the graded area, prior to perspective correction in darktable.
It worked for me, without needing to blur or in any other way treat the “composite area” before perspective control.
Depending how large a repair it is some people before all the AI stuff have used liquify to simply stretch things over and fill… I think @Bruce_Williams may have done this in one of his older videos on that tool… but he would have to confirm that…
As Todd said, I covered that in my darktable videos on the retouch tool. Sorry, I don’t have the episode number handy, But a quick search on my way to would find it.
But looking at the result Charlie got using gimp, I would be going in that direction.
If you really want to stay in darktable, you could also try 2 instances of the colorize module. This approach would require drawing some accurate masks, though. And applying a gradient to blend the two together.
Thats not the one I was thinking of… but it could be of use… check out this video… @Bruce_Williams did on liquify… at around 11:50 in the video… That was what I had recalled as a fix for cropped corners…
