I would be willing to bet that model is done in ZBRUSH not Maya. They may have built the base mesh in Maya but all the detail looks more like it was sculpted. The details would then be reapplied to the base mesh as a displacement texture map if they are using a maya -> zbrush -> maya workflow. It could also be retopo'd.
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 29-03-2013 at 01:30 AM.