The two-way mirror in Harry Potter wasn't fully explained ... with the directors having to make do with the time available to cram as much detail from JK Rowling's books into each film as possible.

An absurd, experimental comedy about a performance artist who wants to perform on one side of a two way mirror so he doesn't know whether ... perception and motivation in art. Artists want to make art ...

He tried the DIY route for the two-way mirror, but decided to just order a glass one after some difficulty with bubbles and scratches. A smart mirror needs an interface, but unless you own stock ...