A crucial factor in ensuring an efficient light simulation during the design process is a reasonable degree of detailing and the assistance of an expert. Time and cost can be controlled by limiting the scope of the presentation. The implementation of the light simulation can either be handled by the design office itself or outsourced to a specialist provider. If handled internally, a rendering can be prepared in conjunction with the design process. Simulations, on the other hand, using an external service provider involve considerable information exchange. This is compensated for by the fact that the service provider has greater experience, can produce quicker results and this can lead to reducing the cost for the design.
The sequence of a light simulation can be divided into four steps: the modelling of the geometry, the definition of materials, the illumination of the model, and the actual rendering process.