what is a shadow?

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Trevor Carpenter
Trevor Carpenter Forum Pro • Posts: 14,345
what is a shadow?

If I use a shadow lifter such as my preferred option in ACR. How does it determine what a shadow is. Two seemingly underexposed pictures, move the slider to the right on number one and nothing changes, do the same on number two and the picture springs into life. Shadow lifting is particularly useful to me shooting BIFs and planes and those nasty dark underwings but how does it know that's what I want to do?   What's the difference between underexposure and shadow?

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