Eric Stevens
On Wed, 17 Sep 2014 01:29:01 -0400, nospam <nospam@nospam.invalid> wrote:

nospam
users edit their images with lightroom (or aperture) and can change anything at any time at any point in the future, *including* altering unsharp mask. to them, *everything* is reversible. that's the *reality*.

Eric Stevens
Which has nothing to with whether or not a process is reversible.

nospam
to put it another way, i can change the amount of unsharp mask on an image i processed a year ago, without having to redo *anything* else i did. all of the retouching, white balance, etc. remain the same (unless i choose to adjust those too).

Eric Stevens
But you can't do that once the image has been exported.