(all) done by mirrors

(all) done by mirrors

Done using trickery, deception, or misdirection. Before computer generated effects, fantastic, unbelievable things in movies were all done by mirrors.
See also: by, done, mirror
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

done by mirrors

and done with mirrors
mod. illusory; accomplished in a way that is purposefully deceptive. He’s not really smart. It’s all done by mirrors. The whole budgetary process is done with mirrors.
See also: by, done, mirror
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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