Stretch part of image at angle?

[PixLab]

(08-19-2023, 05:01 PM)c4cc Wrote: Now, how do I use Liquid rescale (or any easier alternative methods) to stretch image sections at an angle?

Don't!
LR is good horizontally or vertically, unless you like horrors, I would not even try diagonally

Rotate 25 degrees with the rotate tool
   

Then copy 3 parts with the free select tool
   

You should come with something like that
   

Then stretch the part VERTICALY only of the layer you need to stretch AND adjust/move up the other layer
   

Then link or merge the layers AND rotate back by -25 degrees (minus 25) to get back at the original plan
   

---

Result
   

Then > You will just need to reinforce the blacks (black lines) to get back the sharpness, as those rotation are a bit destructive...
Filters > Enhance > Sharpen (Unsharp Mask), default setting should be good enough
or if you're a bit more advanced > duplicate your final product and do a high pass > Filters > Enhance > High Pass... on the duplicated above and put that layer in Soft light mode