https://bugs.kde.org/show_bug.cgi?id=408915
Bug ID: 408915
Summary: Blur effect: too much darkness with dark translucent
backgrounds
Product: kwin
Version: 5.16.0
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: effects-various
Assignee: kwin-bugs-n...@kde.org
Reporter: tsujan2...@gmail.com
Target Milestone: ---
Created attachment 121001
--> https://bugs.kde.org/attachment.cgi?id=121001&action=edit
Comparison with older KWin
The new KWin blur effect (dual blur algorithm?) is much better than the older
one but, after upgrading to KWin 5.16, something has changed, so that dark
translucent backgrounds look too dark with blurring.
I've attached a screenshot for comparison: the darkness of a black terminal
with an opacity of 60% (40% translucent) seems quite unnatural against the
wallpaper, whether it's compared to older KWin versions or to Compiz.
There's no difference in darkness when the same terminal is put against a
completely white background.
There's also another issue, which I should have reported sooner: The new blur
effect is too strong, so that even a value of 4 in the blur settings dialog is
more than enough in most cases, while the slider supports greater values.
Perhaps the blur settings needed to be updated after the new blur effect was
implemented.
I have Intel graphics and use KWin with X11.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma
(available in About System)
KDE Plasma Version: 5.16.0
Qt Version: 5.12.3
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