With 60 hours of imaging over, I have gathered all the data I set out to gather for the IC1396 Elephant Trunk Nebula image in Narrowband Hubble Palette. This image involved a 4-panel mosaic with 10 exposures per filter, per panel. All exposures were 30 minutes long, captured with Sulphur-II, Hydrogen-Alpha and Oxygen-III 3nm filters. The following is the end result:
The above end result required a refined narrowband image post-processing workflow in PixInsight. This made use of the exceptional work by Rick S. from the PixInsight forums, who made the ColorMask script. This script is able to produce a mask image from a range of colour hue values, thereby selecting out specific colours for post-processing. I personally think it is worth mentioning use of this script in the tutorial about touching up colour in narrowband images, so it will happen soon enough.