I've been using CS6 for 1 year, and suddenly have some desaturated skin tones in a few photos, it looks like the skin is painted with grey paint!
I first saw this in a couple of JPG conversions, the RAW NEFs from a Nikon D800 were ok, but now have found the same thing in some NEFs.
I am using an HP laptop with Win 7 64 bit and 8gig memory.
If I advance the Sat and Vib sliders in ACR, some of the grey becomes colored, suggesting there is a threshold below which the skintone saturation drops out completely.
No other colors exhibit this effect!
Thank you for the replies, I am traveling right now and am about to lose internet for a bit.
This problem was just noticed and is visible in 3 out of 1500 photos.
Well, I just attached the offending .JPG and the problem disappeared , so did a screen capture and the problem shows up! Looks like it must be something peculiar to this computer and hopefully will not wreck the raw files.
I find it curious that it shows up in areas I would believe to be in gamut.
Thanks for your help.
Sorry, I have no answers for you, but I have got to say that is a stand out glitch. Can you tie it down at all? Try the same files on a different RAW conversion program for instance? When was your graphics card driver last updated, and could that have happened as an automatic process? Yep. That is one heck of a glitch.
Could you elaborate on how the images got converted to JPEG.What are the post processing steps. What is the profile and bit depth of the images? ( we can see how ACR is set, but it does not tell us what the images are)
Do you know if turning off »Use Graphics Processor« in Photoshop’s Performance Preferences would have an influence on ACR?
That’s usually good for verifying GPU driver issues in Photoshop itself.
Thanks everone for all the suggestions, I'm about to embark on another leg of my journey but will try some of the suggestions next stop.
I did contact Adobe support - got a case # and tried to submit some examples via FTP, but the Cute FTP login failed!
I'm pleased to see that my uploading the .JPG attempt did not show the problem, so hopefully the raw files are not corrupt.
ACR Lens Correction Defringe Purple Amount setting was set too high (16) !
Looking at pixel level magnification, a desaturation 'fringe' grows wider as the slider value increases.
Any non zero setting shows as a gray zone in shadowed skin tones even though the lighting was flat.
The .JPG difference was the result of applying a different lens profile.