Index: gnome-shell-extensions-3.26.0/data/gnome-classic.css
===================================================================
--- gnome-shell-extensions-3.26.0.orig/data/gnome-classic.css
+++ gnome-shell-extensions-3.26.0/data/gnome-classic.css
@@ -1602,7 +1602,8 @@ StScrollBar {
 
 .login-dialog {
   border: none;
-  background-color: transparent; }
+  background-color: transparent;
+  background: #2e3436 url(sle-background.png); }
   .login-dialog .modal-dialog-button-box {
     spacing: 3px; }
   .login-dialog .modal-dialog-button {