Rob ... great narrow-band data set .... 22 hours of image acquisition .. building 3 large image mosaics ... what a monumental task. I couldn't ask for anything better for my first try at narrow-band image processing ... thanks!
My take on this image was processed 100% using Photoshop. Most of the processing was done using predefined "action" sets
* Resize images to 1800x1333 to speed up processing
* Three (3) iterations of the "BIG STRETCH" action
* Global noise reduction on the OIII and SII images only, using the free Google Nik Colllection
* Duplicate the three images and remove the stars on one set using the "RemoveStars" action
* "Tone Mapping" for the starless images using the NikCollection to bring out faint nebulosity
* Deconvolution of the starless images using the "Deconvolution" action
* Remove residual star artifacts on the starless images using "Despeckle" and "Dust & Scratches" (faded) tools
* Combined the 3 starless images using the "Hubble Palette Creation" action
* Combined the 3 star images using the "Hubble Palette Creation" action
* Copy and pasted the starless image onto the star image then combine using "Blend" with "Lighten" option
* Minor color adjustments using "Levels", "Saturation" and "Vibrance"
* Selective sharpening using "Unsharp Mask"
* Selective noise reduction using Nik Collection
* "Flatten" Image and crop out black bands around the perimeter
The Nik Collection for Photoshop is a very useful set image processing tools that every
PS user should have. You can download the free Google version from the Internet Archive website:
https://archive.org/details/nikcollection-full-1.2.11