LR does do auto-highlight compression, but wouldn’t automatically adjust the Exposure, Contrast, Whites, Blacks sliders up or down unless you clicked something like Auto-Tone or double-click the Whites and/or Blacks sliders.
Can you supply an Exported DNG that has all your settings in it including the cloned part, and upload it to http://www.dropbox.com/ then post a public share link to it, here?
What I’m imagining doing is taking that DNG, making a copy, undoing the background cloning, then comparing the two DNGs to see if one is brighter than the other.
Thank you for taking the time to reply.
I didn't click anything auto. The issue is not just with this one image, but many of this series...
Please find both version DNG here:
Let me know what you think... I mean, yes I can readjust the image after cloning, but this shouldn't be happening, should it?
Found that even cloning in small areas will make the brightness change.
Something is seriously wrong here.
The range of values adjusted by Highlights, Shadows, Whites, Blacks, Clarity (at least) all depend on image content so your cloning out a dark area to the left changes the range of values in the image and thus changes what those sliders do.
The difference is very stark between the cloned and uncloned image if Clarity is set to 0 and Blacks to -100 with everything else the same as the downloaded DNGs, where all the settings are identical between the two images, and the background being cloned to white is the only difference in settings and adjustments, so the visual difference is how LR is applying the 5 toning sliders.
The issue is the unwanted background at the left is darker than the subject so it's existence or not determines what "Black" means. Cloning it out changes "Black" to be determined by the details of the subject and affects how the Highlights, Shadows, Whites, Blacks and Clarity sliders work.
I think toning using the tone curve instead of those 5 sliders below Contrast won't have this problem, and I think cropping away rather than cloning away the background then using those 5 sliders won't have the problem.
The bottom line is that cloning apparently happens before toning in the image pipeline and the way those 5 sliders work is as designed so you'll see this difference and it's not a bug.
For reference of anyone else reading this, here are the non-default settings that were saved into both DNGs as downloaded before changing the Blacks=-100 and Clarity=0 for the side-by-side, above.
Well, thank you for figuring this out.
In practice what that means for me is, that cloning in LR is not efficient.
I had hoped to reduce my time in PS, but I guess it will be where I clone bigger parts of white from now on.
While this behavior in LR might technically be a bug it is, for me, a major inconvenience as it slows my workflow down.
Ideally, the sliders' reference shouldn't change once established, no matter what I do with the image.
Sorry, for not being more enthusiastic about the answer...
I just hoped that there was a convenient way to do this in LR for me.
Just do the cloning FIRST, especially when it involves a large change from dark to light.
Option two, get a bigger backdrop
I usually do some adjustments to see if the image / expression really holds up.
A bigger backdrop is not really an option for this as this is a mobile setup that is partly shot in very small locations...
Anyways... Not a catastrophe, just inconvenient...