This article should help you get started

https://community.safe.com/s/article/creating-and-using-geometry-instances

There is also this example FME Template which creates CityGML trees from points: https://hub.safe.com/publishers/con-terra/templates/citygml-create-solitaryvegetationobject-with-implicit-representation

They essentially use the same technique.

Thank you for the response.

I am trying this to run, here they are trying to implement model prepared on single entity on the set of entities, but I have image of the electric pole and I want to use it for visualization on rest of entities, in that sense what will be process flow, usage of feature merger transformer.