Compositing and Chromakey

Compositing is combining elements from separate images to create a new image.  Chromakey is a technique to achieve composite shots, where a specific color is removed from an image so it can be replaced by another image.  These techniques are like the bread and butter of visual mixing.  In repurposing images, one of the most effective ways of creating something new is combining images.  The synergy of these juxtapositions is a great source for artistry.