Quantum cat-stencil interference projection? What is this?

Sorry I don’t hang around here much. I keep meaning to. You’re still the ones I come to when I have no clue at all what a quantum-physics article I come across means though.

http://​​io9.com/​​heres-a-photo-of-something-that-cant-be-photographed-1678918200

So. Um. What?

They have some kind of double-slit experiment that gets double-slitted again then passed through a stencil before being recombined and recombined again to give a stencil-shaped interference pattern?

Is that even right?

Can someone many-worlds-interpretation describe that at me, even if it turns out its just a thought-experiment with a graphics mock-up?