Clicks land where the flat page is, so on the curve they are off by the amount the page was bent.
How it works
The iframe sits on a flat plane through the middle of the wall. A filter then shifts each pixel sideways and up or down, so that from where the camera is, the page lands on the curved panels. The shifts are stored as an image with 256 levels, which is why they come in small steps. Every camera move needs a new image.