Great that its possible! How would you set visibility / RVR without a visibility slider? Voice recognition? Its not all that simple I would imagine as RVR is the distance a light source (e.g. runway or approach light) can be seen by an observer. For the same visibility, RVR is lower during daytime compared to night time. RVR is roughly visibility x 2 during night time while it is x 1.5 during daytime with high intensity approach and runway lights.