Excellent work Josh,
And the Cocoon looks fantastic, even I'm learning from some of your steps. My overall comment is that you went a little too fast but people can replay and pause the video as needed.
What I liked and to add as a small aside to the video;
1, Short cuts for commands MAC = CMD 'A'; PC = CONT 'A' to apply a "Sreen Transfer Function"
2, "Space-bar" to scroll around the open windows to focus on the Cocoon, The "Window Tiling" to keep the desktop tidy.
3, RGB combine first and then apply the luminance data or H Alpha in this case. I would normally do this with galaxies but I think there is an underlying philosophy that we need to explore further...
4,Unlinking the RGB data to better see the actual background colour was an excellent step and even I would have potentially over looked it and probably used the "Back Ground Neutralisation Tool"
5, Copying the "Crop process" so that you can apply the same geometry to the HA. What we should tell everyone is that Pixinsight allows you to copy all of your processes / steps.
6, DBE = "Dynamic Background Extraction" Fully agree with your statement, this is also the one process that convinced me to hand over my money to the people and Pixinsight... Simply WOW... I like many in compromised locations get lots of gradients with my RGB data free of charge! In the past, it has cost me so much effort and time to find the third party tools to resolve this one problem that this alone makes PI worth its money.
7, STF = "Screen Transfer Functions" stretched are the same and this to is a time saver and something that I will be adding to my routine, so you have convinced me. I was a little sceptical because I thought its too aggressive but you have controlled it very well.
8, HDR Multi-scale Transform... Again Wow... This really brought out the dust in the Cocoon and in my opinion "transformed" the image...
9, SCNR wasn't really needed here but it can be used to remove a specific unwanted colour cast as you show. In most cases that colour will be "GREEN"
10, The "Range Selection" tool is also new to me and a nice way to generate a mask as you show. Most of the Tools in PI especially the noise reduction tools come with their own ability to generate masks. I normally use the "Star Mask" tool for this purpose and adjust the scale etc... But it can be a bit hit and miss, so I will be using the "Range Selection" tool in the future.
11, And a "Morphological Transformation" to end it all... Brilliant.
Something for future video's should be the use of Previews in PI to test settinsg to optimise results and we should explain further the reasoning behind making the RGB image first and then adding the luminance data? I know that there is a valid reason but it escapes me at the moment.
Once again thank you very much for your efforts, it takes time to make these video's not to mention the courage!
Josh and I will be announcing a PI challenge later, something to keep you occupied with over Christmas, especially if its cloudy.
Don't worry PI is free to try and you don't need to buy it if you don't already have it.