http://www.zbrushcentral.com/showthread.php?174659-Andrzej-Marszalek-Art-Dump/page2

step 1 you sculpt the mesh

step 2 retopology / remesh for lower polycount

step 3 convert high poly count sculpt in to a normal map "games" or displacement map or vector map for the lower polycount mesh.

sculpting is how you make normal map "games" or displacement map or vector map.

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The Artist that will fight for decades to conquer their media.
Even if you never know their name ,your know their Art.
Dark Sphere Mage Vengeance