Bug 434373

Summary:	Certain mypaint brushes change dramatically from tweaking brush settings
Product:	[Applications] krita	Reporter:	tomtomtomreportingin
Component:	Brush engines	Assignee:	Krita Bugs <krita-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	dimula73, halla
Priority:	NOR
Version First Reported In:	git master (please specify the git hash!)
Target Milestone:	---
Platform:	Debian unstable
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description tomtomtomreportingin 2021-03-13 21:44:17 UTC

SUMMARY
Certain mypaint brushes change dramatically when tweaking even minor settings, and can't be tweaked back to their original form without reloading the preset.

STEPS TO REPRODUCE
1. Select coarse bulk 2.myb.
2. Observe original form.
2. Change any setting.
3. Observe new form.

OBSERVED RESULT
Brush changes dramatically.

EXPECTED RESULT
Changes to the brush should correspond to the actual settings changed.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Debian sid
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
This happens with at least coarse bulk 2.myb and kabura.myb.

Comment 1 Halla Rempt 2021-03-14 09:07:13 UTC

Can you check whether it's the same in Mypaint? If so, it's not a bug...

Comment 2 tomtomtomreportingin 2021-03-14 10:23:57 UTC

From what I can tell, coarse bulk 2 in Krita and coarse bulk 2 in MyPaint differ quite a lot in function. Krita's version is a lot more unwieldy, spraying everywhere in front of the path of the stroke based on speed, while MyPaint's coarse bulk 2 is a lot more tradtional. Similar behavior on changing brush settings doesn't seem to occur.

Comment 3 tomtomtomreportingin 2021-08-31 14:26:20 UTC

Although the brushes noted in the report are no longer included in Krita 5, the described behavior can still be seen in the included "e) Marker Medium (mypaint)" brush.

Comment 4 Halla Rempt 2024-06-13 09:34:11 UTC

I'm not sure whether we actually can fix this -- the student behind the mypaint brush engine is long gone, and it's not the easiest brush engine to hack on. But I can confirm the issue.

Comment 5 Dmitry Kazakov 2024-10-25 14:19:12 UTC

I guess we should mark the patch as needs-info since I have rewritten a lot of mypaint brush options since then...

Tomtomtom, could you please recheck the bug in the modern Krita?

Comment 6 Bug Janitor Service 2024-11-09 03:46:41 UTC

🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!

Comment 7 Bug Janitor Service 2024-11-24 03:46:27 UTC

🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.