Check out this github repository

https://github.com/tum-gis/ifc-to-citygml3

CityGML is not yet officially released so there is no version 3 yet in the FME CityGML writer

Thanks for your answer.

I've seen it, I'm trying to create a CityGML 3.0 file but it does not work, in fact, I probably have a problem with it gml_parent_id.

While with FME Inspector the 3D model appears normally.

Check the log file for warnings. There might be some hints in there​

I think CityGML 3.0 has been officially released.

https://www.ogc.org/standards/citygml

Do you plan to support CityGML 3.0 in FME 2022? > Safe

See also here.

https://community.safe.com/s/idea/0874Q000000cTy1QAE/detail

Let's hope so! FME support would really help users move to the new standard

Hello @virtualcitymatt​ & @Takashi Iijima​ , fairly certain development is starting to work on this now. Not sure if it will make it into 2022.0 or 2022.1 however.

Note* we do have limited support for R/W CityGML3 right now, with the GML R/W uing CityGML3 schemas. Also, we don't support appearances yet for this. Hope this helps, Kailin.