How can I set the background image of a GridPane? I tried using CSS -fx-background-image: url('background.jpg'); however that does nothing for me. Setting the background color still works, so I am not failing to properly reference the GridPane, and when I use that same line on other controls, the image appears, so I am referencing the image correctly, too.
EDIT: I feel I should also note that in the CSS Reference Guide it says that a GridPane should have -fx-background-image since GridPane has Pane and Pane has Region, which has -fx-background-image.