Before revision:  perform physically-based daylighting simulations powered by the Radianceengine (2) study sunlight penetration in different hours of the year by navigating through time (3) Interact with a 9-point-in-time matrix for the nine most representative times of the year  (4) Visualize, compare and analyze daylighting simulation results using integrated tools in virtual reality.
After revision:  perform physically-based daylighting simulations powered by the Radianceengine (2) study sunlight in different hours-of-the-year, (3) Interact with a 9-point-in-time matrix for the nine most representative times of the year (4) Visualize, compare and analyze daylighting simulation results using integrated tools in virtual reality.