![]() ![]() I think "non-destructive" is an incredibly important term. Their original color values will be re-calculated and it will be translated back into 8-bits for display and saving. ![]() It is taken for granted that parts of your final image will have been changed once. The term "non-destructive" refers to the editing process not to the final output. As long as the adjustment layer is there, you intend to apply it at some point, right? Then it gets destructive. In fact the whole term "non-destructive" is misleading and I wish people would stop using it. In other words, if you take the same 8-bit image and work on it in both 8-bit and 16-bit modes, you will not get any difference at all in the end results. Surely the sole reason you need 16-bit depth is to work with high bit-depth source images? Data integrity is irrelevant since Photoshop's calculations aren't limited to any bit depth. You still need 16 bit depth to preserve full data integrity. But when I first opened a 16-bit image in Photoshop the first thing I did was to open the Color Picker to test that the image really was 16-bit. Banding is only a result of having a source image with too low a bit depth.Īs far as being able to tell if values are the same color, that goes back to if you're really able to perceive the difference. In other words, banding is not created by working in 8-bit. It therefore shouldn't make any difference whether you have 1 adjustment layer, or a thousand, Photoshop only shifts the values once and converts them back to 8-bit once. Surely when Photoshop calculates the effects of multiple adjustment layers, it only rounds down to 8-bit or 16-bit at the very end of its calculations? It would be crazy to round down to 8 or 16 every step of the way. Just one adjustment layer curve can mess things up, but if you have several adjustment layers, it can get bad quickly. You can work non-destructivly and still need to use 16 bit for reducing banding and other artifacts.
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