Bug 407901

Summary: Standard filter blur brush doesn't respond to Pressure/opacity slider
Product: [Applications] krita Reporter: grzegorzpedrycz
Component: Brush enginesAssignee: Krita Bugs <krita-bugs-null>
Status: CONFIRMED ---    
Severity: normal CC: ahab.greybeard, griffinvalley, halla, tamtamy.tymona, vitamorus.art
Priority: NOR    
Version First Reported In: 5.2.6   
Target Milestone: ---   
Platform: Other   
OS: Microsoft Windows   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description grzegorzpedrycz 2019-05-24 12:15:50 UTC
SUMMARY

Standard filter blur  brush doesn't respond to Pressure/opacity slider .  No matter how hard you draw brush work the same  ( blur image on the same level ) 

STEPS TO REPRODUCE
1. Use standard brush " filter_blur"
2. 
3. 

OBSERVED RESULT



EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
Comment 1 grzegorzpedrycz 2019-07-09 09:25:51 UTC
Any news ?
Comment 2 Halla Rempt 2019-07-09 09:28:05 UTC
Sorry, no. We haven't even had time to try to reproduce the issue yet. The opacity option probably should be disabled because it doesn't make much sense for this brush engine.
Comment 3 grzegorzpedrycz 2019-07-09 09:44:18 UTC
Why no senase ? its only way for gradation of filter effect , from little to max blur  ;)
Comment 4 Halla Rempt 2019-07-09 09:45:41 UTC
Because this is a filter brush, not a generic blending brush. It applies a filter, and filters aren't aware of things like pressure sensors. There would have to be a generic way to connect input sensors to filter parameters, and that does not exist at this point.
Comment 5 Ahab Greybeard 2019-07-10 15:25:58 UTC
Using the latest 4.3.0 pre-alpha appimage, with 166 Filter Blur Motion, 23.3 Filter Blur and 60 x) Filter Blur, I find that the brushes do respond to Toolbar Opacity slider variation but do not respond to stylus pressure variation.
Comment 6 wolthera 2019-09-21 15:33:14 UTC
Then I'll confirm for Ahab's observation.
Comment 7 Tiar 2021-03-28 01:42:27 UTC
Here there is a bug that the filter brush won't react to the Opacity curve (no matter, pressure, or distance or something else), which is probably easily fixable (?), and a wish to make filter brush engine filter options react to sensors (which is a much bigger task).
Comment 8 Vitamorus 2024-12-13 22:17:21 UTC
Re-confirmed for 5.2.6.
Fingers crossed it was an easy fix all along (making filter brushes respond to pen pressure for opacity).