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Curves on TIF files are not retained


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When I open a .tif file with a curve layer in Affinity Photo, the curve profile is not there.  The curve layer is there but no curve.  The same file opened in Photoshop has the curve.

When the file is opened in Photoshop and immediately saved as a .psd file, then opened in Affinity Photo, the curve is there.  .psd files seem to work in Affinity Photo but not .tif.

Other layers in this .tif file seem to be unaffected such as Vibrance--they work fine.  A Levels layer works fine as well.  Only seems like a Curve Layer problem.

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Was Photoshop used to edit and export the .tif file? Been so long since I used Photoshop I can't remember if there is some sort of setting for adjustment layers being exported as editable.

Mac Pro (Late 2013) Mac OS 12.7.6 
Affinity Designer 2.5.5 | Affinity Photo 2.5.5 | Affinity Publisher 2.5.5 | Beta versions as they appear.

I have never mastered color management, period, so I cannot help with that.

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It is my understanding that TIFF files do not have native support for layers. Some applications store layer information (PS, Affinity) but they do so in proprietary, undocumented formats.

When you try to read, for example, a PS-saved TIFF file with PS layers in some other application you will normally get a flattened version of the image, and you do not get all the layer content.

The same would be true trying to read an Affinity-saved TIFF file with Affinity layers in any other program. The image would be there, but the layer information is lost because the format is not known to anything but the Affinity applications.

-- Walt
Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases
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Thanks for the input.  Still, it's a deficiency and it's isolated to the curves layer.  Others, like Levels do not seem to be affected nor any other I've seen.  The point being, there's either something to fix or a "switch" to be set that'll solve the problem.

Tom

 

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