render with emphasized egdes

How can I render a mesh so that the edges are emphasized? I’m after an “CAD-like,” engineering diagram look…

Here’s a good tutorial on it:

Thanks for the good reference…but here’s a tougher one:

how can just the outside edges of the mesh be accented, and not every edge?

have you tried the Edge settings when rendering? Set your width pretty small, and front-side edges will not be displayed. Use a color that contrasts with the background but not with the object. see the wiki on Rendering

As a patent holder, I need CAD style as well, but with sharply defined frontside edges; there are posts here to help with that.