Bug 449850 - Blur filter on filter layer renders with artifact
Summary: Blur filter on filter layer renders with artifact
Status: CONFIRMED
Alias: None
Product: krita
Classification: Applications
Component: Filter Layers (show other bugs)
Version: nightly build (please specify the git hash!)
Platform: Microsoft Windows Microsoft Windows
: NOR normal
Target Milestone: ---
Assignee: Krita Bugs
URL:
Keywords: triaged
Depends on:
Blocks:
 
Reported: 2022-02-09 12:43 UTC by yetanotherpainter
Modified: 2024-09-01 10:16 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

Attachments
System information from Krita (2.54 KB, text/plain)
2022-02-09 12:43 UTC, yetanotherpainter 		Details
Screenshot of gaussian blur on a paint layer in a group layer (237.07 KB, image/png)
2022-02-14 14:14 UTC, Halla Rempt 		Details
Krita file with artifacts (152.50 KB, application/x-krita)
2022-02-16 18:51 UTC, yetanotherpainter 		Details
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Description yetanotherpainter 2022-02-09 12:43:23 UTC 
Created attachment 146489 [details]
System information from Krita

SUMMARY
***
While using filter layer with Gaussian Blur the resulting image looks like it was cut off.
***


STEPS TO REPRODUCE
1. Create a new Paint layer
2. Draw a filled shape (circle in my case)
3. Put this layer into a group
4. Add new Filter Layer on top of the Paint Layer
5. Use Gaussian Blur filter with maximum blur value

OBSERVED RESULT
The blurred shape looks as if it was cut by square

EXPECTED RESULT
Entire shape blurred without cut edges.

SOFTWARE/OS VERSIONS
Attached in file

ADDITIONAL INFORMATION
The behaviour is observed on portable version
Comment 1 Halla Rempt 2022-02-14 14:14:26 UTC 
Created attachment 146711 [details]
Screenshot of gaussian blur on a paint layer in a group layer

Could you please check this screenshot, whether I have tried correctly to reproduce your issue? I doesn't show anything weird for me...
Comment 2 Halla Rempt 2022-02-14 14:14:46 UTC 
Oh, and maybe also attach the kra file that shows this issue?
Comment 3 yetanotherpainter 2022-02-16 18:51:23 UTC 
Created attachment 146833 [details]
Krita file with artifacts

If you take a closer look at your blurred circle you will notice small cuts on the top and left.
Comment 4 Halla Rempt 2022-02-16 19:31:35 UTC 
You're right! Thanks for checking!
Comment 5 Robert Moerland 2024-09-01 10:16:42 UTC 
I can reproduce the issue running krita-x64-5.3.0-prealpha-703c3eae on Windows 10, with the steps as described in the original report. The attched example file also still shows the buggy behavior in this version. To emphasize, the step of adding the filter layer to the group seems to be essential for reproduction. Moving it out of the group results in the desired behavior.