I saw this on a Discovery type of channel. Essentially they take cameras and they point cameras one way and then project them in a way that instead of seeing the object you see the screen projecting what your eye would see if the object weren't there.
Its not perfect and if you really stare you kind've can tell something is amiss, but its good enough that if you're not really focused on that spot you aren't going to pay attention to it.
Moab
I am tired of everyone fighting with each other. This is all by design.
Call your state legislators and insist they approve the Article V convention of States to propose amendments.
I pledge allegiance to the Constitution as written and understood by this nation's founders, and to the Republic it created, an indivisible union of sovereign States, with liberty and justice for all.