In pictures: The history of 3D cinema and 3D telev...
Once 3D began to kick off, the revelation of image polarisation came to light (pardon the pun). An early short that utilised the Polaroid 3D process was 1940’s Magic Movies: Thrills For You. It consisted of views that could be seen on Pennsylvania Railroad's trains.
Image: [[xref:http://www.thephotoplayer.com/|The Silent Photoplayer]]
In pictures: The history of 3D cinema and 3D television