Rendering the viewport with no materials?

Hi there,

Quick question: is there a way to render the viewport look, without any materials at all? Or just screen-recording it? 

I know we can add a very basic/flat material to everything and render like that, or do the trick that Jonathan teaches at the end of the Fundamentals of Shading, but that still gives it lighting and "material" look.

I'm going more for a "Process" demonstration... does that make sense?