Ah. That OIII detail indeed should be easily brought out by weighing O-III higher for the purpose of luminance (you don't have to give up SHO coloring like many in that thread seem to feel they need to!).BainthaBrakk wrote: ↑Tue Sep 29, 2020 12:55 pm Thanks for the help Ivo!
I'll try to show you via a picture (Anne S) which I think have nice detail in the nebula and a tamed starfield with your picture as comparison:
The "wispy" O3 I'm rambling about is in the bottom-left corner of the nebula..
I tried using the Entropy module a little, but I have not tried that before so I think I have to read up on that one. Thanks for the tip!
As for "reduction" of the star field, it appears that this image is the result of a pretty crude application of a minimum filter ("Morphological Transform"). The exact same "stringy" look with the same pits, holes, artifacts and destruction of the filaments can be achieved by not using a star mask at all in the Shrink module (set iterations to 1, De-ringing to Off, Regularization to 0.00, Mode to Dim; which dumbs down the treatment to a simple minimum filter - at th every least I would de-select NGC6888). I would obviously not advocate trying to emulate this image if your goal is to do photography rather than creating "art"... E.g. this is close-up of that image is not something I would strive to emulate personally;
Of course, it's a free world!