public virtual void CreateCamera()
{
// create a camera and initialize its position
Camera = SceneManager.CreateCamera( "MainCamera" );
Camera.Position = new Vector3( 0, 0, 500 );
Camera.LookAt( new Vector3( 0, 0, -300 ) );
// set the near clipping plane to be very close
Camera.Near = 5;
Camera.AutoAspectRatio = true;
}