I have no idea how a good astro image should look, but I have tried anyway.
No Noise reduction from Detail tab because colors around stars where lost, and I think they should be kept.
20200725_Humboldtsee_mit_Daniel_425.jpg.out.pp3 (13.2 KB)
RT5.8dev commit b55312140
Note that some processing is done with some wavelet options only available in dev version.