What file format does Fusion 360 primarily use for 3D models?

Fusion 360 primarily uses the F3D file format for 3D models. This format is the proprietary file type used by Fusion 360 to save entire project files, which include not only the 3D models but also associated data such as assemblies, sketches, and parameters. The F3D format allows users to maintain the complete design intent and all features within the Fusion 360 environment, facilitating collaborative work and cloud-based storage.

On the other hand, STL and OBJ are common file formats used for 3D printing and mesh models, but they do not retain parametric design information or feature history, which are vital in a CAD environment like Fusion 360. DWG is used primarily for 2D drafting and does not represent 3D model data in the way F3D does. Thus, the F3D format is uniquely tailored for the capabilities and workflows within Fusion 360.