Combining images or parts of images to create something new.
In this case an image from one of my favourite films and a picture of me from a few years ago.
(at least I could have put a smile on my face!)
I was asked to look "smouldering" in these test shots,
well that didn't work then!
A black and white image can be turned to sepia or painted in colours to create a portrait or whatever else you like.
( This page )