I have an image with 9 layers above the backround layer. The layers are for making adjustments to make a print. When I flatten the image, there is a visible change in contrast that occurs, or other tones that should not be occuring. I have tried everything to figure out why such a change is happening and am stumped. There should be no change at all. Can anyone help??
You try merging all layers to a new layer and see if the same effect occurs (on PC: CRTL ALT SHIFT E). If not, just delete the other layers and don't worry about it. Since you were printing, were you in a soft proof mode that was subsequently not active?
Just a guess... some adjustments (layers) look a little different at anything less that 100% view. When you flatten while viewing at, say, 33%, the display might appear to change.
So as a test, set your view to 100%, then flatten, and see if you notice any change.
I tried your suggestion and when flattening at 50% viewing or greater, no changes in screen appearance occur. At less than that, changes begin and at 12.5 % viewing the changes were greatest. My image was 20x28 so viewing at this small size was needed to get it on my screen.
Glad it "solved" your problem. This issue has been discussed a few times in the past. I rarely see it happen, but it happens. Suspect it depends on the image and the nature of the adjustment. Also, "round" percentages(25, 50, 100) usually give a more accurate preview than odd percentages.
