https://bugs.kde.org/show_bug.cgi?id=455570
Bug ID: 455570
Summary: Krita plus 5.1.0 prealpha : complex brush outline
causes intolerable performance lag
Product: krita
Version: nightly build (please specify the git hash!)
Platform: Microsoft Windows
OS: Microsoft Windows
Status: REPORTED
Severity: normal
Priority: NOR
Component: * Unknown
Assignee: krita-bugs-n...@kde.org
Reporter: tgdev...@gmail.com
Target Milestone: ---
Created attachment 149907
--> https://bugs.kde.org/attachment.cgi?id=149907&action=edit
Texture of the gauze brush
SUMMARY
There's a gauze brush that causes Krita to stutter and lag
for some unknown reason.
In order to have you make investigation, I'll append the picture of the
brush tip here. It's noticeable when you try to paint or to resize the brush
with
the Shift+drag combination.
Because of that, I can't use it to work.
STEPS TO REPRODUCE
1. create a custom brush with the provided png file
2. Settings for the custom brush as follows :
# Sharpness mod ON : pressure(min : 30%, max : 60%)
# Rotation mod ON : fuzzy dab(min : -180°, max : 180°)
# Spacing : 0.37(auto : off)
3. Try to paint strokes with the brush at 500 pixels size or more.
4. See if you can increase size to 1000 pixels with smooth updated renders,
using the Shift+drag method.
OBSERVED RESULT
Krita struggles to update the rendered outline preview of the brush when the
size is
big(500-1000px), noticeable frame rate drop or stutters.
Krita paints the stamps at a slower speed than expected when the size is
big(500-1000px).
EXPECTED RESULT
No stutter or framerate drop.
SOFTWARE/OS VERSIONS
Windows: 10 21H1
Qt versions : Version (compiled): 5.12.12, Version (loaded): 5.12.12
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