Luwx added a comment.
Making good looking pure svg box shadows is a bit tricky. A while back I tried to create one: F7590931: shadow.png <https://phabricator.kde.org/F7590931> The right one uses blur (like breeze decoration does) and the left uses gradients with quite a few stops to emulate the blurred square (I don't know if this has any effect on performance), radial gradients were used only in the corners. It this is of any help, here is the svg: F7590940: shadow.svg <https://phabricator.kde.org/F7590940> REPOSITORY R242 Plasma Framework (Library) REVISION DETAIL https://phabricator.kde.org/D24593 To: niccolove, #vdg Cc: Luwx, filipf, ngraham, davidedmundson, kde-frameworks-devel, LeGast00n, GB_2, michaelh, bruns