I know it is often necessary but bringing in dumb 3D objects to Archicad sacrifices so much of Archicad's potential with regards to more intelligent and responsive geometry.
PARAM-O! PARAM-O! PARAM-O!
You should try using Param-o, so easy and so much fun. Create an actual GDL object without coding and then you will have something that you can evolve with your needs, and to which you can apply resolution controls and specific 2D representations, and individual materials for different components, and any parameter you want to schedule that's automatically populated.
I also have a solution that is for creating catalogues of components using intelligent GDL functions so you can access many different elements via a single object, so you don't have to keep storing dumb geometries downloaded from the web. The solution is called "Infinite Anything", which, if you know my other tools such as "Infinite Openings" and "Infinite Joinery" you will appreciate the humour in the name... kinda means "double infinity". You can check it out here:
https://www.youtube.com/watch?v=jjSxKUEO7_A
Its not available on the website yet because I haven't had time to polish the UI
Creator of Cadswift's parametric GDL libraries
Creator of Infinite Openings and Component Catalogues
Push the envelope & watch it bend
website:
https://cadswift.com.au/
YouTube:
https://www.youtube.com/user/CADSwift/playlists