From VRML 2 Basic Concepts and Definitions CPS616 -- Information Track of CPS -- Spring Semester 98. byZeynep Ozdemir, Rob Baker, Meryem Ispirli, Geoffrey C. Fox
Extrusion
A compact representation of extruded shapes and solids of rotation.
Allows richer set of basic 3D objects (VRML1.0 is only sphere, cylinder, box)
Text
Replaces VRML 1.0's AsciiText node; has many more options -- in particular to allow easy use of non-English text.