Yes I can see the problem. The solution is do not use the GEGL Shadow-Highlights filter. Use something else.
You must have missed Ofnuts "smart" link on https://www.gimp-forum.net/Thread-ofn-luminosity-masks In full the download is:
https://sourceforge.net/projects/gimp-to...p/download
Other tools to try for adjusting your image(s)
There is always the Gimp curve tool.
The gmic ( http://www.gmic.eu ) channel processing filter is a bit more complicated but has options for tonal ranges. The gmic Shadow-Highlight filters also give a 'glow' effect so avoid those.
Quote:Are those "luminosity-masks" provided by Pat David or by Imgur.com?
You must have missed Ofnuts "smart" link on https://www.gimp-forum.net/Thread-ofn-luminosity-masks In full the download is:
https://sourceforge.net/projects/gimp-to...p/download
Other tools to try for adjusting your image(s)
There is always the Gimp curve tool.
The gmic ( http://www.gmic.eu ) channel processing filter is a bit more complicated but has options for tonal ranges. The gmic Shadow-Highlight filters also give a 'glow' effect so avoid those.