Bug 381453

Summary:	CMYK occsionally and randomly damages images.
Product:	[Applications] krita	Reporter:	Emily <elampson>
Component:	General	Assignee:	Krita Bugs <krita-bugs-null>
Status:	RESOLVED LATER
Severity:	normal	CC:	halla
Priority:	NOR
Version First Reported In:	3.1.3
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	The damaged art Original psd file

Description Emily 2017-06-20 16:31:16 UTC

I've had this happen twice, once 2 years ago and now today.

Basically what happens is sometimes, when making an image CMYK, the file messes up. It still opens, but the white space is now black, the line work is damaged and looks smudged and fractured. Preview image will be blank. I completed another image the other day with CMYK and it was fine, still it. But this one, I had it almost completed last night, saved it. Opened it this morning to finish it and it had this damage. File is saved as a tif. I have a PSD file saved of it that I originally saved it as which is still fine. I was working in CMYK because I have plans to print the image. 

In 2015 (I don't remember which version sorry), I tested to make sure I could share a Krita tif (using the program for the first time) with someone else who would be using Photoshop, the same thing occurred in both programs. I had the original file and saved it in PS, didn't happen again.

Comment 1 Emily 2017-06-20 16:37:01 UTC

Just noticed now, it also reduced the dpi from 200 to 78.7403

Comment 2 Emily 2017-06-20 16:45:45 UTC

Created attachment 106196 [details]
The damaged art

Comment 3 Halla Rempt 2017-06-20 18:20:54 UTC

Hi Emily,

Could you also attach the original .kra file?

Comment 4 Emily 2017-06-21 00:37:51 UTC

Created attachment 106206 [details]
Original psd file

Comment 5 Emily 2017-06-21 00:40:25 UTC

I don't have a .kra file just the psd.

Comment 6 Halla Rempt 2017-06-21 06:54:59 UTC

I'm not sure what happened... When I take your psd file and save as tif, either flattened or with layers, it saves fine. I loaded the images in Scribus, where they displayed correctly. Gimp cannot load cmyk tif or psd files. Photoshop cannot load layered tif files, so for Photoshop you need to flatten the image when saving as tif in Krita. Photoshop has a special, undocumented way to save layers to tif images that is not compatible with the tif standard.

(Note: it's really recommended to always keep your work in the native format of the application you're using. Kra for Krita, xcf for Gimp, psd for Photoshop, and only export when you need to .)

Comment 7 Emily 2017-06-21 15:26:25 UTC

I'll just continue the project then with a .kra file then until needed. If the issue happens again in the future, should I create a new  report or respond to this one. I have no idea when or if it will happen again.

Comment 8 Halla Rempt 2017-06-21 16:22:40 UTC

To this one if fine! In that case we can reopen it when we've got more data.