[hartman]

Тогда надо менять угол обзора:

private function onResize(e:Event = null):void {		
	camera.view.width = stage.stageWidth;
	camera.view.height = stage.stageHeight;
 
	var viewDistance = 400;
	camera.fov = 2 * Math.atan2(Math.sqrt(camera.view.width * camera.view.width + camera.view.height * camera.view.height) / 2,viewDistance);
}