How to make a mesh look like it was 3D printed How can I make a mesh "look 3D printed", i.e. you can see the layers. e.g.:



You see all those layers? How can one do this? Maybe a bump map? or is there an option to separate a mesh into pieces, i.e. explode it?
Bump map setting for BI (example)

I'd recommend the Wood procedural texture for this:





Bump map setting for Cycles (example)

You can use a Wave Texture node set to Bands as bump map: