Error when importing CityGML file

I’m trying to import a citygml file on cesium ion using FME workbench and i’m facing some issues.

First i had a problem with geometry. Apparently cesium only support closed geometries (screen below).
When i tun a geometry validator on FME and kept only valid geometry i got a new error : Unsupported citygml node (screen below).

Could you please help figure out what the error is about.


It looks like the issue is the with the MultiGeometry tag as that is not supported by libcitygml, which Cesium’s pipelines depend on. Can you please replace all MultiGeometry tags with MultiSurface and then reupload this file?


I tried importing without the Multigeometry features and it worked. Thank you so much