A double exposure comes from the analogue photo age and was often the result of a mistake. Two images - exposures - ended up on top of each other in the camera or the developer.

The technique has survived as a creative move that is actively used on, for example, film posters, and with Photoshop it can be perfected better than ever.

Some tips

The result is often best if you combine two quite different images, e.g. a portrait and a landscape.

The portrait is easiest to work with if it is taken against a completely white background, and with little light on the subject. A good tip is to turn off the ceiling light and photograph against the outside light.

To emphasize facial features, the model should stand in profile (sideways).

Editing

In Photoshop, the portrait is placed at the bottom. Landscape images are superimposed and the blending mode is set to "Screen". Then landscape images are only visible where it is completely black, and fade into the shades of grey.

To finish, one can remove unwanted details, light up parts of the face to highlight them, copy layers and vary transparency.