Now we have a box with the map 'baked' into the geometry we can output the file as a VRML by choosing File>Export and selecting file type VRML97 and ensuring you save the file in the Same Location as the image used in your material!
Once you have chosen the location you will be presented with the VRML97 Exporter Dialog
, here it is best practice to Deselect Primitives and also Deselect Bitmap Url Prefix>Use Prefix
. This is a way to locate external maps but it does not currently work with Shapeways Full Color 3D Printing.