In the same manner as photos can be evaluated based on technical quality criteria, designers can check renderings for errors. Where the first impression often determines the general aesthetic appearance and the similarity of the lighting effect to the natural environment, there are various criteria for a critical technical evaluation. The desire for maximum precision in a visualisation has to be balanced with the complexity of detailed modelling and the time-consuming calculation. So, designers need to find a reasonable compromise between precision and speed for the simulation.