For PS but the same workflow is possible in gimp :
https://www.cloudynights.com/forums/topi...nh-stretch
https://www.youtube.com/watch?v=IU1BeS_XED4
Some more infomation: if you can't import the ArcsinhCurves in gimp you can convert them to cube files (see link) files and use them in gimp : Filters/G'Mic-Qt/Colors/Apply External CLUT.
https://clayharmonblog.com/stacker.html
https://www.cloudynights.com/forums/topi...nh-stretch
https://www.youtube.com/watch?v=IU1BeS_XED4
Some more infomation: if you can't import the ArcsinhCurves in gimp you can convert them to cube files (see link) files and use them in gimp : Filters/G'Mic-Qt/Colors/Apply External CLUT.
https://clayharmonblog.com/stacker.html