My last attempt at NGC253. It is not going to be featured on the front page of Sky and Telescope. I can see Stars within the Galaxy, I'm happy with it, given the light pollution of Melbourne Boronia and the 9 Day old Moon.
This was processed using PixInsight, I'm slowly weening myself off Photoshop.
Good job Peter, you are on the mark. In line with what Colin said, just a little to much noise reduction applied. Just a play around in PI will fix that.
Yes, I agree with you totally, the noise reduction was a little savage. I was following a youtube that shows how to use AtrouseWavelet when the data is in the Linear Mode, I will try halving his settings and maybe reduce the number of layers and see if I can ease it off a bit.
Many thanks for your comments.
I still haven't gotten my head around that one myself, I usually just crease a clipped luminance mask (luminance with the lower end of the histogram clipped off), invert mask that on my RGB and use the MultiscaleLinearTransformation with the first Residual layer unchecked. On my RGB I'll usually do that twice as I am more interested in noise reduction than preserving detail.
on taking the PI plunge deeper 
