Hi @jaspr, yes, we put all the three LoD-s (Algemene concepten - 3D BAG) into the CityJSON files, and unless you extract the LoD that you need (2.2), all the three LoD-s will be displayed on the top of each other when you open the file.
There are couple of ways to solve this, but since your target is Sketchup, I suggest that you download the OBJ files instead of CityJSON, With the OBJ format, you get a separate file per LoD.
Alternatively, you can use cjio’s (GitHub - cityjson/cjio: CityJSON/io: Python CLI to process and manipulate CityJSON files) extract_lod
command to extract the LoD 2.2 from the CityJSON file.
Or in QGIS in the CityJSON loader plugin you have the option to load the LoD-s as separate layers or as attributes.
Or FME can also load a single LoD from a multi-LoD CityJSON file.