But then you're adding in several more processing layers away from reality: 1) the digital scan won't pick up the details sufficiently 2) the AR rendering will

But then you're adding in several more processing layers away from reality: 1) the digital scan won't pick up the details sufficiently 2) the AR rendering will again strip a lot of detail It'd also be incredibly difficult and straining for your eyes of focussing on a canvas and then on an AR image