I think that the S and X have three forward-looking cameras center-mounted. Without a binocular baseline with which to establish distance, ranging of on-center

I think that the S and X have three forward-looking cameras center-mounted. Without a binocular baseline with which to establish distance, ranging of on-center obstructions could be difficult. Even if an edge is visible, the frame-to-frame variarion is low, especially for a black rubber sheet at night. I'd also be curious about the radar absorbsion of that rubber impact barrier. This, in part, is why Musk's assertion that this hardware would be sufficient for level 4 autonomy was so ridiculous. It really wasn't the kind of lanuage that a responsible engineer would use.