What is the native file format used by Autodesk Navisworks?

The native file format used by Autodesk Navisworks is NWD. This format is specifically designed for the storage of project data and provides a comprehensive way to manage and view 3D models from various sources. NWD files are typically used for sharing and collaboration, containing the complete project information, including models, views, and comments, all consolidated into a single file.

While NWF files are also utilized in Navisworks, they serve a different purpose. NWF files act as a project workspace that references the original model files but do not encapsulate data into a single file format as NWD does. DWG is a native file format for AutoCAD, primarily used for 2D drawings, and IFC (Industry Foundation Classes) is a standard file format used for interoperability in the AEC (Architecture, Engineering, and Construction) industry, focusing on building and construction models, but it is not specific to Navisworks. This distinction highlights why NWD is the correct answer when identifying the primary native file format for Autodesk Navisworks.