Index: src/greeter/theme/Main.qml
--- src/greeter/theme/Main.qml.orig
+++ src/greeter/theme/Main.qml
@@ -55,7 +55,7 @@ Rectangle {
 
     Background {
         anchors.fill: parent
-        source: "qrc:///theme/background.png"
+        source: "qrc:///theme/puffy-sddm.svgz"
         fillMode: Image.PreserveAspectCrop
         onStatusChanged: {
             if (status == Image.Error && source != config.defaultBackground) {
