Scanning electron microscope look

Hi, was trying to reproduce the effects on this site:
After lots of futile attempts, it looks like the solution is very simple after all. Just one hemi light that shines at an angle from behind the subject. that’s all.
I gave Suzanne a little translucency and bump map for that S.E.M. look.
I will look up some real S.E.M. pics on the web and try to reproduce them in Blender.
Let me know if you have suggestions.

also try putting a negative lamp at the exact same coordinates as your camera. [!]

OK, I added the negative lamp, but I don’t think that it yields the S.E.M. look that well. You are only left with almost a silhoutte.
The first image is with the negative lamp and the second with only the hemi.