iges to w3d conversion is most likely related to export of IGES 3D models to one of the possible output formats, Autodesk Design Web Format looks like the obvious pick here, but certainly not the only eligible w3d file type. Unfortunately, we have not found anything specific about this, so if you are in need of help with this type of export, it would be perhaps best to reach to one of the online communities dedicated to 3D modeling.
Updated: July 25, 2023