/* THIS IS IS MY 3D GAME-SCENE */

// Some crash about not using "init(size:CGSize)".
let overlayScene = SK_OverlayScene()

// There is no such thing as "self.size" in SceneKit.
let overlayScene = SK_OverlayScene(size: self.size)

// Some crazy crash I can't figure out at all.
let overlayScene = SK_OverlayScene(size: myGameViewController.sceneView.bounds.size)