i remember trying this as i read it - but it doesn’t work. Trying it today i don’t get it to work! There are two possibilities: a) i miss something important (maybe one little button to press away from success - the displacement texture didn’t affect the nails…) or b) the dupliverts is done before the displacement and the displacemant doesn’t affect the nails. Could you give me a hint - i suppose it’s variant a and i’m blind ;)!
Beside this problem i love to script things and it was a good way to learn more about the python scripts in blender it took not too long to say it’s a needless effort!