Created attachment 138013 [details] screenshot STEPS TO REPRODUCE 1. open System Settings > Appearance > Window decorations 2. click on "Get new window decorations..." button 3. search for WhiteSur Aurorae theme and install it 4. close "Get new window decorations" window 5. observe the previews of the WhiteSur window decorations OBSERVED RESULT See the attached screenhot please. Only the first preview looks correct. EXPECTED RESULT correct preview for all installed themes SOFTWARE/OS VERSIONS Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.21.80 KDE Frameworks Version: 5.82.0 Qt Version: 5.15.2 Graphics Platform: Wayland
Heh yeah.
Created attachment 154030 [details] WhiteSur x1.25 decoration I suspect the bug is in the decoration itself. For me it just fails with the scaled versions (x1.25, x1.5) which I suspect were made to workaround some possible bug (maybe solved?), since the should be correctly scaled by kwin anyway. And then, if you apply those decorations, they also look wrong on the actual windows. So in this regard, the screenshot is depicting an almost accurate result of the decoration, which results to be buggy.
I'm closing this, as it is most certainly a bug in the WhiteSure scaled versions. From what I've experienced, the decoration is painting the window borders wrong (with excessive margins around) to the actual widows when it is applied, even when the screen scaling is set to 1.25x too. The previews look wrong because they are depicting the actual behavior of the decoration. Please, feel free to reopen if your experience is different (the decoration behaves well on windows, just not on the previews)