Architecture was an obvious candidate for computer animation but its use was relatively small before 1975. The main reason that viewing architectural buildings is not possible before hidden line elimination between objects made up of many parts is available. Mike Archuleta's hidden line program at Livermore was an early system but was relatively slow. It produced a shaded image of an object with hidden lines removed as a set of raster lines made up of points with appropriate intensity. Some colour animations were produced at Livermore and also at the Atlas Computer laboratory.
There were some computer animations made of the transit of planes, people or luggage through airports etc. Bruce Cornwell's paper Computer Generated Simulation Films (1971) considers the design problems encountered in the production of computer generated motion pictures which simulate real events.
Ron Baecker's paper Computer-Animated Simulation Models: A Tool for Transportation Planning (1975) is an example that also gives a good set of references to earlier activities.
Larry Feeser's paper Computer Generated Animation for Analysis and Design (1975) describes the use of computer animation in the placement of a highway route taking into account interrelationships between physical design parameters and ecological and environmental consequences.
Probably the most influential paper concerning architecture of buildings was Don Greenberg's paper Computer Graphics in Architecture (1974) in Scientific American. The ability to produce colour 3D graphics with shading showed what would be the future.