Nighttime view of the TurboCAD model from the south . I sarted doing the 2005 design using TurboCAD - a very user-friendly CAD system capable of quite good fast rendered perspectives, and excellent for 2-D drawing. But the French Architect Mr Lanterne, who prepared the documents for the planning permission application, used ArchiCAD, and so I was persuaded to switch and learn to use that, so that the model and drawings I produced would be compatible. In France any house over 170 square metres must be presented for planning consent by a French Architect.