how to add rgb stars to HOO image

[alacant]

Hi everyone

Layers:
I've the HOO in panel 1 and the rgb stars in panel 2.
What settings do I use to place the rgb coloured stars above the HOO stars?

Screen shot attached.

TIA and clear skies,
Steve

ss_1.jpg (93.84 KiB) Viewed 3366 times

[almcl]

One way to achieve this (may not be the 'correct' way) is to set up a star mask on the foreground layer and set layer mode to 'Color of fg', then adjust 'Blend amount' to taste.

Screenshot below of adding RGB stars to a bi-colour of the Eastern Veil (ignore the offsets, my RGB stars didn't line up with the Ha/Oiii composite after cropping and needed adjusting).

RGB Bicolour blend.jpg (154.41 KiB) Viewed 3350 times

[Carles]

Hi,

beside the masking method @almcl said,

you can also try NBAccent.
in this example I've processed the narrowband file, quickly just to check this as I usually use NBAccent without processing it first,
then load my RGB in Compose and the processed file in NBAccent slot. (guess you should select the third option, from dual-triband)

processed the RGB slightly just to get stars exposed and right colour, then got into NBAccent and tweaking the sliders a bit, depending
on how you've processed that file.
before

Screenshot-5.jpg (262.46 KiB) Viewed 3324 times

after

Screenshot-7.jpg (290.18 KiB) Viewed 3324 times

it keeps the star colours, and add the nebulosity of your NarrowBand file.

is worth a try ^^

Regards

Carles.

[alacant]

Thanks @almcl for the 'Color of fg' idea. Even SGL types liked it
@Carles , you set me a challenge: NBAccent or bust. Still trying.

Thanks again and clear skies