Okay, my first try was to convert the three images in RT and then merge them in GIMP. Then the darkest image alone with some tone curves and weird saturation boost looked better than the merger - here it is
IMG_9815_RT-7.jpg.out.pp3 (17.0 KB)
Okay, my first try was to convert the three images in RT and then merge them in GIMP. Then the darkest image alone with some tone curves and weird saturation boost looked better than the merger - here it is