Hi, .stl files are not directly supported by Vizard (see the Vizard documentation for supported ones!
) - however you can import them into 3ds Max from where you can export them in the IVE or OSG formats which are Vizard's native file formats.
If you do not have access to 3ds Max then Blender (free and open source) can read stl files from where you could export as an .obj file to Vizard.
Hope this helps
