The Cinema 4D importer lets you download 3D models from Sketchfab directly into C4D, while the exporter allows you to upload your C4D scenes to your Sketchfab account.
Cinema 4D
Cinema 4D Plugin & Integration Guide
Cinema 4D Plugin & Integration Guide
The Cinema 4D importer lets you download 3D models from Sketchfab directly into C4D, while the exporter allows you to upload your C4D scenes to your Sketchfab account.