Effect
Solarize
Invert tones past a threshold for classic solarisation.
True solarisation is extreme overexposure; what photographers usually mean is the Sabattier effect: a second exposure during development that partially reverses tones and draws halo-like outlines. The phenomenon was described in the 1860s; Armand Sabatier’s name stuck, misspelled with a double t in much of the literature.
In the late 1920s Lee Miller and Man Ray turned darkroom accidents into a controlled surrealist technique Man Ray called solarisation. Digital threshold inversions echo that partial reversal without the chemistry.

Properties
Threshold
tone flip pivot
Amount
blend toward solarized look
Mode
how highlights invert
Softness
edge soft around threshold
Command line
Requires Rethings Pro. Install the tool from Rethings → Install Command Line Tool…
rethings apply --effect solarize --set threshold=0.5 --set amount=1 -i input.jpg -o output.png










































