I'm presenting LDN 1622, AKA the Bogeyman Nebula, close up and with as much detail as I could tease out of the dark nebula portion.  I had two goals: 1) retain detail in the darkest part of the nebula  and 2) highlight the beautiful yellow reflection nebula seen at the top.  @Gary Imm Posted this yesterday with an excellent (as always!) description of what's going on there:

"The most interesting aspect of this object to me is the bright yellow young pre-main sequence star (HBC 515) seen on the lower right side of the image in the head of the cloud. This star is one of the visually brightest young stars known. The star is surrounded by a yellow reflection nebula designated as vdB 62 or Parsamian 3. I also find it interesting that the cloud is silhouetted against a faint background of glowing reddish hydrogen gas."

I shot some test subs in Ha but, looking at the result, I felt it would only take away from the dark nebula and make it more difficult to get the color balanced to show the yellow reflection.  So this is all LRGB.  The dark parts are quite dim so I shot quite a bit of RGB data and used those R, G, and B masters with the Luminance master to create a SuperLuminance.   No signal was wasted!  

I tested BXT on this and found that it eliminated all of the detail in the darkest portion of the nebula.  It did a nice job on star sizes and added a bit of structure to the bright reflection nebula.  To have the best of both worlds I created a luminance mask and blended the bright parts with BXT and the faint parts without BXT.  

Running NXT also obliterated the detail in the darkest areas.  So I waited to do noise reduction till after stretching.  This gave NXT more bit space to work and that kepts the darkest parts from blocking up.  

Apparantly there is a reallly bright star just out of frame here because all of my subs featured a sharp diffraction spike running through the entire frame.  I've seen this before with Alnitak on the horsehead.  To eliminate that distraction I used SXT to get rid of the stars and then selected the spike in Photoshop.  Content aware fill was used to get rid of the spike and then the stars were screened back in.  While I was getting rid of the diffraction spike on the starless version, I noticed there was a dust donut the flats didn't catch.  Same process for fixing that as for fixing the spike.  Just use content aware fill to match it to the surrounding background before adding the stars back in. 

Color calibration was done with SPCC which produced a very nice linear fit of the star colors.  Lots of little curves adjustments and contrast adjustments were used to reveal the detail in the dark nebula and keep it from clipping.  

I'd like it to be less noisy but I think I would need to double the integration time to make much of a difference.