fat outlines for all visible model edges?

Hi,

I have a rather simple 3d scene, imported from blender. I want to have all visible edges to be drawn out with a fat line, like the toon shader does, but just with outlines (I tried the toon shader, but it only shows the outlines of objects). Maybe a shader that applies fat lines to all visible vertices? Is there anything like this?

I don't know if you can do that with a shader, but the Edge Detection (Depth-Normals) image effect works great for that sort of thing.