There is a direct export from Archicad to C4D if You want to make renderings. Try to find it on german archicad sites - the only one link that I got seems not working http://www.gshelp.de/CDownloads/Downloads9import.html
Best Rafał //Archicad since 4.1 version //MacBook Pro Retina 2019/2.4 GHz/Intel Core i9/32GB RAM/Radeon Pro 5500M 4GB/macOS 13.6 //Razer Intel i9/2.5GHz/32GB/Nvidia RTX 3080/Windows 11 Pro //ArchiCAD 28/Twinmotion 2024
AFAIK exporting as 3ds is about the only way to work with ArchiCAD and C4D. They (Maxon C4D) are upgrading their plug-in support for v10 and I hope to see it before the end of the year. Enjoy the demo.