In a holographic universe, all the information describing a certain volume of space would reside on its 2D boundaries. A close look at the boundaries would reveal no detail smaller than individual packets of information, much like the dot-like pixels of a photograph that appear when you zoom in. But with increasing distance from the information source, the dots would appear to blend into one another to create a smooth picture and, eventually, a 3D image. Think of the universe as a Magic Eye poster, with myriad dots on a 2D surface that turn into a 3D picture if you look at it in just the right way.
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