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| p.1 #4 · p.1 #4 · Threshold adjustment layer / clipping mask not working correctly in CS6 |
OK, well regarding what you show in your second post, there can indeed be differences in what appears on your display screen when at less than Actual Pixels when using layers. Photoshop uses certain display shortcuts in this scenario for what I assume are performance reasons. When you are doing an operation at the fine pixel level like you are doing these differences can be significant.
In these situations, you really need to be viewing and comparing at Actual Pixels. It's not exactly Adobe's fault for this either. Anytime you are viewing an image at less than 100% zoom (Actual Pixels), compromises need to be made regarding how that image is shown on screen. You can say "well at least Adobe should make the flattened vs. layers view look the same" and I can understand that to a point but consider that there are performance issues that Adobe has to contend with when displaying multiple layers and neither preview is "absolutely correct" with respect to how the image will look at full resolution/Actual Pixels.
Now beyond that, I thought you were saying you were seeing differences at Actual Pixels between original and saved or between one application and another. Is that the case?
Also, at some point it might be a good idea to explain what you are trying to do and why. For example, I question whether Threshold is the best way to accomplish what you are trying to do. When you use the Threshold adjustment in this scenario, you are changing grayscale noise automatically to full-black and full-white noise. It makes a major change to the characteristic of the noise beyond what appears from a distance to be a simple noise "volume" adjustment. I suspect something like Curves may work better for you but you're the one who knows what you're trying to achieve.