I am using this dev version:
RawTherapee_dev_5.8-2847-g53bb6e41b_W64_Skylake_210422
As far as I can find - it’s not possible to rotate the rectangle in Local Adjustments?
If it could be rotated - and a linear graduated filter could be added as a tool - it could be used the same way as the Graduated Filter - but with more than one occurrence.
Also the 4 dots in the ellipse should have a horizontal component to shape it ad libitum.
Thank you, Desmis. Will investigate those options further.
What about a horizontal component to the navigation points in the ellipse? That would make it at lot easier to shape it closer to an object. Sometimes the Preview Delta E scope is not excluding everything for good reasons.