I have recently read that @agriggio has implemented several new features in his own version of RT (called ART). Among these are a perspective correction tool “copied” from Darktable.
It turns out that I’m kind of allergic to tilting lines so I very often have to adjust the sliders in the current perspective tool until I’m satisfied with the result. Using Darktable it often only requires one click, then to work is done!
Look at this beautiful, old-style seaside resort shot from close range. Lots of tilting lines:
One click, Darktable analyses the image and corrects the tilting lines. Very easy and a nice result:
Maybe @agriggios code could be included in the standard RT version?