Playing with this self made pattern in gimp :
for diffuse, bump and displace.
And a subdivided cube (needed a lot more than i thought to get the displacement not ugly, more than 200k faces)
I decided to play with a negative displace value in the texture :
The negative version of the displace reminds me of some electronic circuitry.
A previous test on that other thread
Without displace (only bump+diffuse) :
(all in blender internal, not cycles)