Stereograph

Click on the image below to toggle back and forth between the left and right images from a 1901 stereograph.

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Below, the original stereograph of a scene in the Bowery, New York, and a picture of it mounted on an antique stereoscope.

Below, an alternate way to convey the effect, by rapidly alternating the left and right images, though with disconcerting flicker.

See also A sense of relief on the Image Animations page for a similar treatment of the effects of parallax.