BuildingDesign is an intuitive 3D modelling application that allows you to create large architecture models of various shapes. The program supports import from DWG and DXF files and thus significantly simplifies model creation. The created model is structured in simple tree structure which makes navigating through project parts simple and intuitive. Within the application you can find interactive tutorials which will help you learn how to get from empty project to valid calculation. Calculation methods are separated into several modules so that each user can use only what he needs. Calculations can also be combined, allowing you to calculate both artificial and daylighting in a single project. Calculations of artificial lighting, daylight and sunlight are supported, including the new European standard EN 17037.