I'd like to see someone exposing a Tesla to a intricately produced Wile E. Coyote tunnel. I would predict that it would stop, because the vision stack leans heavily on motion vectors to map out drivable space. And even if it didn't, the tunnel could only be painted to have the correct perspective at one point along the road. Moving closer would result in the model seeing the road get narrower, causing the car to slow down (narrower roads necessitate slower speed) until it gets within a few car lengths — at which point the painted road would appear so narrow as to be literally undriveable.

If Tesla hasn't already tested this in simulation, I'd be astounded.

Also if a false tunnel good enough to fool FSD beta, I'd suspect it'd also be good enough to fool a decent proportion of human drivers too.