RADIANCE is a complete and sophisticated package of programs, whose aim is to produce realistic 3D displays of various lighting scenarios, and to provide quantitative analysis such as visual comfort evaluation.

Colours are taken into account within the calculation method based on ray-tracing technique.

The number and the shape of the elements making up the model are unlimited.

Simulation running time is usually longer than with SUPERLITE, but the accuracy of the results is very useful for creating the realistic behaviour of lighting systems.