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.
@msamazing That looks like light produced by the Moon to me. Did you take these images when the Moon was above the horizon? Note that the Moon is a strong OIII emitter.
If no Moon was visible then, yes, it may be light pollution.
The moon was not above the horizon but shouldn’t that filter cut out light pollution?  I am using this filter:
Â
https://optcorp.com/products/radian-telescopes-2-inch-triad-ultra-filter
@msamazing No, as I wrote the Moon is a strong OIII emitter (actually reflector) and you should avoid shooting OIII under moon light.
Having said that, the left and lower lower left of your image seem to have an excess of OIII when compared to other OIII images of this nebula on internet. That seems to indicate it is light pollution.
BUT it could be due to flats or other calibration files as well. Have you checked those and verified that they were taken correctly?
