Curves not working in LAB Color Space

[patk28090372]

I had a chat with tech support about a week or two ago about an issue that came up with Curves. This issue is still there after re-installing Photoshop today as tech support had suggested.

Problem:
When working in LAB Color Space the Curves Adjustment label is greyed out and I cannot access it. 
I haved used this for many years and it appears to have stopped working a few updates ago.

*Screenshot attached in Word.

Thank You,
Patrick Kavanagh.

[kglad]

what app?

[patk28090372]

Photoshop

[kglad]

in the future, to find the best place to post your message, use the list here, https://community.adobe.com/

p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.

<"moved from cc desktop bugs">

[Conrad_C]

I see it too, it’s strange that Curves isn’t available as an adjustment layer from the Layers panel in Lab mode.

I found a workaround…but there’s something strange about that too. It does work if you add the Curves adjustment layer from the menus (Layer > New Adjustment Layer > Curves) instead of the Layer panel. So it can be done, but for some reason is not working in the Layers panel.

Image > Adjustments > Curves also still works in Lab, but that’s the destructive version of the adjustment, not an adjustment layer.

A moderator should move this thread to the Bugs section.

[Trevor.Dennis]

@Conrad_C  Is this happening with documents created from the outset in LAB mode?

I just changed a document from RGB to LAB and was able to add curves layers from Layers panel, Adjustments panel, and menu.  I am using Windows 11.  We don't get to see what platform the OP is using when Keith moves it.

[EDIT] I see you are using a Mac.

[Conrad_C]

I’m on a Mac. I just started a new document and set it to Lab mode. At first I thought it might be because it was 16 bits per channel, but Curves was still dimmed after I changed the document to 8bpc.

So maybe it’s a Mac thing?

[patk28090372]

I am on a PC. Thanks for looking in to this as I not familiar with the inner workings of these programs.

[Ged_Traynor]

I wonder if it's related to this issue

https://community.adobe.com/t5/photoshop-ecosystem-bugs/p-photoshop-26-2-adjustment-layers-grayed-ou...

[Conrad_C]

Yeah, it actually does look like that. Thanks.

[D Fosse]

This is a known and acknowledged bug. We've had a ton of posts about it.

It will get fixed. In the meantime everything still works from the Adjustments panel, or from the menu Layer > New Adjustment Layer. So you can still use these adjustment layers in Lab or CMYK.

[patk28090372]

Thank You! I will go this other route.

[patk28090372]

Thank You!