Time fusion is something I couldn’t find elsewhere. Basically it is a longtime exposure. Nothing new so far. Why making a point ?
Longtime exposures fascinate me. There are famous ones of extreme long exposure times, say one year. The camera is always at the same location. What happens with a moving camera while doing a longtime exposure ? Motion blur !
A photographer typically uses a shake or a rotation of his camera while holding it in his hands or e.g. mounted on a tripod with full flexible ball head. Postproduction uses a single shot or a combination of blurred and non-blurred images to get a result.
Here is the new idea. Sun was shining and green and yellow summer fields exerted a strong attraction to me while driving at high speed from Heidelberg to Paris using a TGV train. With my iPhone looking out of a train window I started to experiment with the Slow Shutter App. The motion blur gets a horizontal orientation with some landscape in the background of an image. The foreground is completely blurred. Some light reflections of the train window are always added. No rotational or shaky effect occurs.
Compare this method to a single shot motion blur during the sunset at Sylt island or to the yellow trees in the High Sierra, CA. The foreground has to be more marked, the background tends to be more blurred.