Houseshaped 3d Solids

It's easy to extrude polylines. This can help to create a 3d model of an urban area. The extrusions will have a flat top though. The 'Houseshaped 3d Solids' command will help you to create a more vivid model. You will have to select polylines, preferably with 4 vertexes. In the main menu of the command you can specify what kind or roof shapes you want to apply. By default all roof shapes are activated and when you choose to use them all they will be applied randomly to the new solids. You can also activate just one roof shape. That doesn't mean the 3d solids will be the same. By default the command will apply random base heights and roof angles to create an even greater variation in roof shapes.