MicroStation lets you save a DGN file as an IGES, Parasolid, ACIS SAT, CGM, STL, STEP AP203/AP214, VRML, SVG, OBJ, FBX, SketchUp, Luxology, Google Earth, Collada, U3D, or JT file in the following ways:

• Directly by choosing File > Save As. The current export settings control the conversion.
• Interactively by choosing File > Common File Types, Exchange File Types, 3D Modeling File Types, or Visualization File Types and selecting a particular file type. Using this method, you can adjust export settings before proceeding.
• By issuing commands from the system prompt on systems that have one.