30 Days to Build a City: Rapidly Extruding Realistic Virtual Worlds
Models of existing buildings are finding increased application for walkthroughs,
visualization and promotional material.
This paper describes the modelling of an entire city, including creating
realistic models of individual buildings, accurately positioning each structure
and adding the surrounding terrain and roads.
Each building is matched to the original floor plan, provided with a realistic
roof geometry, and painted with colours and textures corresponding to the
Mechanisms for providing drive-arounds, route finding and attaching multimedia
content to the resulting model are investigated.
The techniques described emphasize efficient and realistic model construction.
The concepts are applied to a case study: the creation of the virtual Grahamsto
The process of creating this model from initial conception, to finished
multimedia presentation took 30 days.
 Shaun Bangay. 30 days to build a city; rapidly extruding realistic virtual worlds. Technical report, Virtual Reality Special Interest Group, Computer Science Department, Rhodes University, Grahamstown, South Africa, July 1997. [PDF] [BibTeX]