Feasibility of 3D printing with atomic holography?

_Accelerando_ contains mention of using interfering atomic lasers to
spontaneously generate physical objects, analogous to using interference
patterns in laser light to generate 3D images.

Google has informed me of the use of atomic holographs to print 2D layers of
atoms onto a substrate (mostly as a semiconductor lithography process,
apparently), but, modulo the restriction that everything would have to be
made of boson atoms, what's the feasibility of extending that to actually
construct arbitrary 3D shapes?

-l.
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