What is needed to create a 3D rendering depends on how accurate the  3D rendering needs to be.
If the interactive map will be used for route optimization in a large warehouse, exact dimensions will be needed to ensure proper wayfinding. CAD files would be necessary. CAD files are always great but renderings used for marketing proposes do not always require this level of detail.  For external only renderings, though CAD files would be helpful, photography and other visual assets can also be used.