The lighting design of the Chiesa Dives in Misericordia in 1998 constitutes a milestone in that this is the first time that virtual luminaires from ERCO were used for light simulation. This made it possible to show, check and analyse concept variants at an early planning stage. Approximately 160 virtual luminaires were used in the model of the church. The individual images from the Lightscape program were combined with interactive modules, which were accessible to all designers via the Internet and allowed them to evaluate the various light scenes.