New answers tagged noise
I have the same issue as well. I noticed noise whenever I use the cpl filter. Is it due to a low quality filter or just something that occurs by using such filter?
The suggestion by Cambridge in Colour is a bit of a hack to get round the fact that earlier versions of Photoshop had no "average" function for image stacks. It falls down when you reach a certain number of images as the opacity values have to be rounded to the nearest integer. Anyway, the effect you want is that the images are combined in a certain ratio, ...
The better route is to covert the images into a Smart Object / Image Stack, then set the stack mode to 'mean' or to 'median'. I do that all the time for night images.
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