Hi Andrew,
I had a quick go at your picture -
I hope you don't mind?
When I split the channels I could see how noisy the blue was.
I added noise & blur to the blue background &
I adjusted the bright stars in the blue channel to give a smaller profile.
I have also increased the brightness of the RGB background & worked on the core
to increase it's: brightness, vibrance & contrast with
a blurred layer mask.
I also reduced the red in parts of the background as it was especially stronger in the top left hand corner
when the background brightness was increased.
I also gave it some HLVG to reduce green looking stars.
Do you think it looks better now?
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