it's some vector art.  I would say I am familier with Illustrator, but the only technique I can think of to accomplish this would be using the pen tool and outlining each individual layer of shading.  Is there a better way, or is it really that monotonous of work?
Here's the pic
			
			Here's the pic
 
				
		 
			 
 
		 
 
		 
 
		 
 
		 
 
		
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