I tripped on this randomly.
https://www.youtube.com/watch?v=PZoCJBLAYEs
Its a talk by Tony Hallas on how he produces noise free DSLR images. Its right out of left field, im not sure what to make of it. I havent heard of this method before.
He doesnt bother with darks or flats.
He sees DSLR noise as "colour Mottle", constant large diameter random colour dots 5-10 pixels in size that are the same in each exposure. Ive seen this effect as everyone has, but I didnt know it was constant!.
He dithers each sub by at least 5-10 pixels (during capture), aligns the subs, combines them, and bingo, no noise!, no other noise reduction used!.
Have I missed something?.