What kinds of things might be the causes of all the slowdown? I've 
turned off all media and reflection and it is still abysmally slow.

One major revision I've made to Chris Colefax's CityGen include file is 
that each building is now called by a macro and generated individually 
at runtime. Whereas originally a single copy (more or less) of a 
building was stored in an array and replicated/duplicated when needed.

The other difference of course is that buildings now have greater 
complexity. They make use of more CSG operations and feature a greater 
number of storeys.

-- 
http://isometricland.com

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