Greebling; this is a piece of LEGO jargon that put simply means mechanical-looking details with no actual function other than providing detail. Today we're sharing one specific example of greebling by Didier Burtin on Flickr that uses parts in ways we've never seen before: https://www.flickr.com/photos/101676083@N08/28130365477/in/dateposted/
As pictured in the image, parts such as the 1x1 clip and minifigure binoculars have been poisoned to create mechanical details such as pipes and vents. These piece's unique profile make them perfect for microscale applications, as are any pieces with a bit of texture such as the 2x2 round tiles with hole and zip line handle.