Correct. Their problem is that the projector they are using is projecting a 2D plane. It would be a different story if it was a circular projector (think of a

Correct. Their problem is that the projector they are using is projecting a 2D plane. It would be a different story if it was a circular projector (think of a LED strip). It has to be then rotated only along a single axis. Turning the projector circle physically can possibly add additional precision. Magnetic fields can be used to keep the container sphere in place. I am now going to take the screenshot of this conversation and send it to my self in a registered mail.