I am interested in getting back .osm format from CityEngine. It looks like CE can import .osm, but not export.
Is there a work-around that works for you? Thanks.
No, there is no way to export to OSM directly from CityEngine.
However, it seems you might be able to export your 2D shapes to FileGDB and import the gdb into something else like ArcGIS Desktop and use this free add-on for OpenStreetMap data.
ArcGIS Editor for OpenStreetMap | Overview
Thanks for the pointer.
I'm going to look at Using ogr2ogr to convert data between GeoJSON, PostGIS and Shapefile since I don't currently have ArcGI$ Desktop. Will report back what I come up with.