--- pcmanfm-qt-0.15.1/config/pcmanfm-qt/lxqt/settings.conf.in_orig      2020-06-17 14:17:35.902046213 +0600
+++ pcmanfm-qt-0.15.1/config/pcmanfm-qt/lxqt/settings.conf.in   2020-06-17 14:17:51.392038711 +0600
@@ -15,7 +15,9 @@
 [Desktop]
 DesktopShortcuts=Home, Trash, Computer, Network
 WallpaperMode=stretch
-Wallpaper=@LXQT_SHARE_DIR@/wallpapers/waves-logo.png
+Wallpaper=/usr/share/backgrounds/default.png
+WallpaperDirectory=
+WallpaperRandomize=false
 BgColor=#000000
 FgColor=#ffffff
 ShadowColor=#000000