Hi, Thank
YOU for reading!
This Tutorial is thought to work mainly with object with mixed continuum and narrowband emission like galaxies.
Nebulas are mainly narrowband line emission.
It can work, but it is not suited for it.
Much better is the Vicent Peris article here
http://www.pixinsight.com/tutorials/narrowband/index.htmlI don't know if this method can work with OIII emission: OIII is a mix of green and blue, so, maybe we can try to apply the method to both the channels and try to enhance the green and the blue component...
but I've never done, it would be very interesting