Introduce techniques, strategies, and tools for creating optimal models that keep lag to a minimum.
Minimising Lag Polygon reduction Level of detail Switch Billboards NURBS Optimisation tools
Principles of three-dimensional computer animation (O'Rourke) chapter 2
VRML Sourcebook (Second edition) Chapters 11 and 25
Perceptually Modulated Level of Detail for Virtual Environments (Reddy)
GeoVRML: For handling geographical data http://www.geovrml.org and the paper "Under the Hood of GeoVRML"