Parallel Graphics is leading the way with this technology, providing their amazing Cortona VRML Viewer free. This product receives frequent updates and is better than ever. The Cortona viewer is a mere 1.3 meg download. It will be needed to view several VRML1.0 FST converted objects in the following VRML Files Section. ISB3 created VRML2.0 files automatically launch the Cortona VRML plug-in.
File size depends on the complexity of the scene and the objects in it.
ISB3 is a wonderful and exciting tool.