How to prevent FxStage configuration being visible to the user?

[SKeeneCode]

At the moment it seems wherever I configure my stage object in my start method, there is a lag after the stage being shown to when it is modified. Given the example:

public class Demo extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage)
    {
        VBox box = new VBox();

        Scene scene = new Scene(box, 350, 200);
        primaryStage.setScene(scene);
        primaryStage.setTitle("Indent Demo");
        FxStage.configure(primaryStage).apply();
        primaryStage.show();
    }
}

Or even just

    public void start(Stage primaryStage)
    {
        VBox box = new VBox();
        FxStage.create(box).apply().getStage().show();
    }

There is a short period of time where the stage is displayed in its vanilla javafx look before it changes.

Is there a way to prevent this? Perhaps hiding the visibility of the stage until the configuration has been made and then showing it?

[micheljung]

Unfortunately, show() needs to be called in order to create the Window. Only then I can access the window handle and modify it. There might be a way to create the window handle before calling show() but IIRC I tried this and debugged deep into JavaFX's source code and it seemed impossible.

I'm not sure if I tried hiding the stage but I don't think one can hide a stage that hasn't been shown :-) I think as soon as you call show() you'll get the flicker, no matter what you do. But feel free to prove me wrong :D