This model is a 1:1 highly detailed reconstruction of the Cologne Cathedral based on 40 blueprints from the 19th century. I built the cathedral in roughly five month using SketchUp. It has full interior design exept the furnishing and some decor. Even the main spiral staircase is fully reconstructed to reach the different floor levels in the southern tower. You can access the whole triforium through various transitions.
The 3D model is undergoing constant expansion and by buying this product it is obvious that all upcoming updates are completly free, if the model was purchased before. Updates will contain all Interior furnishing, exterior details and the sacristy on the northern side of the choir.
The model has a full hierachy of components/instances and layers.
Other file formats are on demand because of the enormous exporting time. This files can reach a size from 6 GB up to 20 GB.