UPDATE FROM MABULA
I have had a very rough 2 months unfortunately health wise. I was struck 3x in a row with bacterial infections. The second infection occurred  after a routine hospital checkup and I became very sick. I had to rest and take a lot of antibiotics. Once I was recovering and restarting work 1 month ago, I again became sick. The infection was not yet gone, so even more antibiotics and rest was needed. Needless to say, it took a lot of my energy and I needed a lot of rest.
Finally, the infection is really gone and my energy is coming back step-by-step now and I have started work again. I am terribly sorry to have kept you waiting for support. I will address all outstanding questions and e-mails step-by step and will be on the forum daily from today.
APP 2.0.0-beta47 will come soon as well, a lot of work was already completed before I became very ill, so the release is also nearly ready for you. Beta47 will be much faster actually. Many workflows will be more than 2x faster, mosaics can even be 10x faster than before because registration really received a major boost... all compared to beta46. Â Before I release it, I will make sure that everything is working properly and then I will release it.
Hello everyone,
I would like to know if there is a guide/tutorial/manual on the APP Combination RGB tool.
Pointing me to a comprehensive link (or even a draft of the final PDF manual) would be greatly appreciated.
In particular for some Formula like SHO (1,2,3,4) I would like to know how to adjust the 1st, 2nd and 6th sliders (Multiplier, BG and L). While it is clear to me what the ratios are for the various channels R, G, B.
Any suggestions would be appreciated.
There's no official one yet, we're working on releasing a good manual with the 2.0 stable release. That said, there's a lot of experimentation in the combine tool that no manual really would cover, it's very personal preference in that sense. If you start with the preset formula's (and press "new formula") you have the basic "best" starting point. From there you can adjust the values and I would just experiment with those. Here's a post in which Mabula explains how to use the tool for better star colors: https://www.astropixelprocessor.com/community/postid/25158/
Thanks a lot Vincent for your answer. Presets are really good and I usually use just them with modification.
That said your asnwer only partially answer my question on meaning of "L", "BG" and multiplier sliders. I will read the Mabula's post, but really look forward for a comprehensive user guide (I am old school, and like book/booklet/reference guides).
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Thank you,
Â
  Alvise
