Looking at double exposures some I feel are not real double exposures because they are not keeping with the traditional sense of double exposure because double exposures are meant to be taken on film and they would be slightly of to the side and they would be a full frame.

Examples of photos that I don’t think are double exposures:

A photographer that I think uses the correct kind of double exposures is Idris Khan. here are some of his photos

Here are my photos trying to emulate his work.

With this image, I duplicated the layer and lowered the layer opacity for the copy and changed the colour to one that would match the transformer box and the tape on it, Giving this image the effect of older 3D glasses.