I am an architect, and use the city engine 2015 for my arch project
to create a model of the city, I use http://www.openstreetmap.org/ to get osm file and export it in city engine.
to extrude buildings I use simple rule file gis_mapping_01.cga from city engine examples (pic1) and choose height attribute (pic2)
so I was able to create a model of Manhattan
but with London model it does not work: height attribute dont give information about building height, Only a few building were extruded (pic3)
I do not understand the code, so if anyone can help, I put a small project where there is this problem, you can make changes to the file to make it work
Thank you for your help
p.s. sorry for my english is not my native language