Testing increasing integration times (OSC, Bortle 8) in Getting Started With Imaging Posted 6 hours ago @CloudMagnet @Ouroboros @ Anyone Else That's Interested Could we try ruling out user error? Seems that me having messed up the pre-processing or integrations is a possible cause for the noise pattern. I've uploaded the files from the latest test here: https://drive.google.com/drive/folders/1simtZOsVAgwuqIT44uMkJ_a_jzGvhE3n?usp=sharing Any chance you could try some integrations and see if you get the same effect? No worries if that's too much hassle for you! FYI the Lights folder contains the 10px drizzled data. The file that begins "REF" is what I used for my reference file. If you wanted to reproduce the exact field of view of my tests, the location ("Region of Interest") in PixInsight) is: Left: 2973 Top: 1756 Width: 400 Height: 400 I then Rescaled to 1000px x 1000px to make it easier to see. What are the odds that we'll see that same noise pattern again?