1 stack of 105 60s images, Canon 800D at ISO 800, Canon 400mm f5.6 lens at f6.3, iOptron Skyguider Pro tracker. 50 darks, 120 biases. Processed in PixInsight as below

* CC defect list + master dark (sigma = 8)
15*(1-(FWHM-FWHMMin)/(FWHMMax-FWHMMin))
+ 15*(1-(Eccentricity-EccentricityMin)/(EccentricityMax-EccentricityMin))
+ 20*(SNRWeight-SNRWeightMin)/(SNRWeightMax-SNRWeightMin)
+ 50
img 4002 ref
* ESD integration, range exclude 
* drizzle integration, gaussian kernel

*****Linear processing
*** Initial 
* Crop
* DBE tolerance 3, manually placed points outside the dust clouds

*** Color calibration
* PCC using a dust cloud as background, aimed at Triffid, background ref upper limit 0.002
* SNCR 0.8 green

*** Decon
* Using EZDecon, create the following: 
* PSF - autogen
* background - autogen, then invert, range selection lower 0.03 smoothness 49, clean with clone stamp, range mask again, invert again - background_range_mask
* star mask: extract luminance, run EZSoftStretch, star mask noise treshhold 0.3 scale 9 smoothness 8 aggregate binarize. Add a couple of ellipses, 2x convolve - decon_star_mask

*** Denoise
Using https://jonrista.com/the-astrophotographers-guide/pixinsights/effective-noise-reduction-part-2/ as implemented by EZSuite. 
* TGV edge protection 3e-5, default MMT


***** Nonlinear processing

*** Initial stretch
* MaskedStretch, default settings
* extract luminance, stretch with shadows 0.05 mids 0.4, apply as mask inverted, stretch mids to 0.3
* ACDNR chrominance only, lightness mask, stdev 4 iterations 6mids 0.2 on lightness mask

***MLT stretch
http://www.stelleelettroniche.it/en/2014/09/astrophoto/m42-ngc1975-multilayer-processing-first-part/

**Initial (fine details)
* created a new multiscale linear transform, kept 6 layers
* diffed from original image to create a "blurred" version of original image
* extracted luminance from original, used as mask on blurred version
* used curves to pump rgb and saturation
* pixelmath sum the 3, rescaled, back to original image

**Second (nebula)
* created a new multiscale linear transform, kept 6 layers, and diff from original
* extract luminance from diff Use as mask on blurred version
* s-shaped luminance curve, gentle, big sat boost
* pixelmath sum the 3, rescaled, back to original image

*** Finishers
* Star reduce with EZscript, 8 layers of morpho
* With the previous star mask on (raw), unsharp mask with default settings)
* Dark structure enhancement
* EZDenoise, default settings TGV, no MMT
* pump up sat in reds and blues
* MMT sharpen, 6 layers biases 0.1 0.1 0.05 0.05 0.25 0.12
* downsample 3x