Short description of Thorns 3D 2.0: Thorns 3D is a growth screen saver. You watch as objects known as thorn nodes grow on your screen then out of the nodes huge thorns emerge. As the nodes and thorns grow they create a whole scene on your computer screen. Even the way the thorns look and grow are your choice! Some options for this screen saver include: Color options, growth types, and growth speed.