Universal 3D (U3D) format was introduced by the 3D Industry Forum (http://www.ecma-international.org/publications/standards/Ecma-363.htm) as a means for transferring three dimensional data from CAD systems to mainstream applications such as marketing, training, sales, technical support and customer service. You can export geometry directly to U3D, as well as create PDF documents with embedded U3D content.

Selecting File > Export > Visualization File Types > U3D (*.u3d) converts and exports the displayed levels of the master model, references, and saved views to U3D format. The U3D file uses the last view in which a data point was placed, with the current view settings. Rendering data such as lighting and materials are also saved to the output file, so that an application displaying the data can use this information to accurately represent the design.

The Export U3D File dialog, which is used to export the current geometry to a Universal 3D (U3D) file, is similar to the Save As dialog.