I just bought a new house and with it i also got a 2d and 3d model of it created on floorplanner.com (.fml/ floorplanner markup language file) which basically is a very large json file.
They don't have any way to export the 3d file in any other format then .fml, so i was wondering if anyone has an idea how i could convert that file into something usable for SweetHome 3D.