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Question

destination gamut warning color shift

Forum|Forum|7 years ago
October 31, 2018
3 replies
2037 views

Hello,

Having a weird issue, but new to this so maybe its normal? Im trying to soft proof a photo in Lightroom classic. Alls well until I turn on the destination gamut warning. as soon as i hover over it or turn it on, the image color shifts and the blacks get darker. it also shows me the red areas when they exist, but I dont know whether to leave it on or off, and which my image will print like. I dont feel the image should change.

(in fact something im noticing is that when the gamut warning setting is on, none of the paper profiles have any effect, but when its off, each profile looks different (which seems like what it should be doing), so I dont get whats going on.. seems like turning it on reverts it back to the original image without a profile)

part 2. when I print from LR with the color profile and then open in photoshop with the same profile embedded, the images dont look exactly the same. the photoshop one is a bit washed out.

third part. Ive been reading that it makes no sense to adjust the red areas when the warning is on as what you are seeing is what will print. is this true? if so, then why are there many tutorials explaining how to reduce those areas to come back into acceptable values. in one case i had some orange areas out of gamut, but nothing unreasonable. when I toned it down, it was completely unsaturated. having printed on this paper before, I know is can print orange...

so all in all a bit confused as to what Im doing wrong.

thanks for the help!

R

destination gamut warning

This topic has been closed for replies.

J

Jao vdL

Community Expert

This happens on all machines I have tried it on. You have to have GPU acceleration on to see it. It works correctly with GPU acceleration off. It is most visible if the simulate paper and ink box is checked but also happens if it is not. It is just a bit more subtle.

Here are some screenshots to show the effect.

Normal soft proof:

Gamut warning on:

You see how the shadows darken considerably

Now warning off and no paper simulation:

Warning on:

The sky is darker in the warning on image. Hard to see in the screenshot but very easy to see when you are switching the warning on and off. I have reported this as a bug and it only happens when you have GPU acceleration on as I said. The Adobe engineers have told me this is caused by the way the GPU path is coded and can't be fixed easily. For now if you want accurate soft proof with the warning working correctly you have to turn off the GPU acceleration.

TheDigitalDog

Inspiring

https://forums.adobe.com/people/Jao+vdL wrote
This happens on all machines I have tried it on. You have to have GPU acceleration on to see it.

It is on, I don't see it. Come on by.

Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"

J

Jao vdL

Community Expert

Would love to. Where are you? This might be dependent on operating system

and type of GPU.

On Fri, Nov 2, 2018 at 9:08 AM thedigitaldog <forums_noreply@adobe.com>

J

Jao vdL

Community Expert

There is a known bug that Adobe won't fix. As soon as you turn on the OOG warning in Lightroom's soft proof, the soft proof of the entire image changes to an incorrect version. So you should not use the OOG warning at all. It simply doesn't work. Also the OOG overlay is incorrect anyway as already noted.

romebot3000Author

Known Participant

thanks. but do you have any insights into the other buggy behavior i listed above? is it possible to reinstall lightroom w/o losing my settings?

J

Jao vdL

Community Expert

You can reinstall without losing any settings. However, none of the behaviors you list above would be helped by a reinstall. The behaviors you describe are quite expected knowing the bugs and limitations of how color management is done. Some of the issues like which printer is selected by default is determined by the operating system and how the printing is set up. You might want to reinstall printer drivers or simply set the right default printer. Also sometimes printing presets can contain printer settings that actually mess things up, so try avoiding those. Last but not least, a lot of strange behavior in Lightroom can be fixed by resetting its preferences so that is also something to try. You'll lose your settings in that case!

TheDigitalDog

Inspiring

The gamut warning is both buggy and not very useful.

The Out Of Gamut Overlay in Photoshop and Lightroom

In this 25 minute video, I'll cover everything you need to know about the Out Of Gamut (OOG) overlay in Photoshop and Lightroom. You'll see why, with a rare exception, you can ignore this very old feature and still deal with out of gamut colors using modern color management tools.

YouTube: https://www.youtube.com/watch?v=00O-GTDyL0w

High resolution: http://digitaldog.net/files/OOG_Video.mp4

Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"

romebot3000Author

Known Participant

thank you, that was very helpful, but a little over my head in parts. One thing I noticed that when you toggled the gamut warning, your image stayed the same colors except the red areas showing up, mine image changes (I think back to the original, pre-profile state, or it looks that way, which is strange, but is that how its supposed to work?). When I change the profiles with the gamut warning on, with some profiles I get a bit more red areas, but the image itself seems to stay the same as before I assigned a profile. when i turn it off, the colors shift again I guess to what the profile allows. but that is very confusing, seems like it shouldnt revert colors. but maybe im just not getting it.

Am i to understand that I should just not use it the gamut warning? If i have it off, then changing the profiles changes how the image looks, and in most cases, the colors get muted. If that happens, can I bump up the saturation or other colors, etc, to make it look better, or does that take it back out of range? That is, when a profile is selected, is what I am seeing what is able to print no matter what?

Thanks again,

R

TheDigitalDog

Inspiring

Yes, the image shouldn’t change once you select an output profile but just the overlay. It could be a number of factors:

1. Check GPU settings (on or off) and try a different setting. This is found in preferences.

2. It could be a faulty ICC display profile. Recalibrate and build a new one.

3. It could be how the profile was built. Set your software to build Version 2 (V2) not V4 profiles.

4. It could be the type of profile built. Try Matrix instead of LUT based profile. Again, that's a setting in whatever software you use to calibrate and profile the display.

As to should you use the Gamut Warning, my opinion is, it's a waste of time.

1. It doesn't change based on the Rendering Intent.

2. The profile and the rendering intent will handle all this for you anyway.

3. OOG (Out of Gamut) warning was designed long before Photoshop (and LR) soft proofed with ICC profiles. The idea was to 'edit' the image to remove the overlay thus placing those colors 'in gamut'. It's not anywhere as precise and isn't necessary with ICC profiles doing this for you. Soft proof and pick a profile based on the image itself, which you visually prefer, then just use that profile with that Rendering Intent.

Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"

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