There is a design mag in Australia that runs a comp like this:
Everyone that enters submits a image of their choice, once everyone has entered. You copy all the images and make a design out of it , winner has the best composition.
Just a thought
Seems a bit over the top compared to grids. So ill say renaissance art. or an art movement i.e. cubism
edit: man having a indecisive day. Digital cubism. there done.