The Revit Daylighting Analysis plug-in (RDA) is specifically designed for architects to be able to use without learning the difference between the Perez or CIE’s sky models, direct normal incident, or direct horizontal radiation. Just specify if you want the whole building analyzed or just one or more floors, and kick the analysis off. If you want more control of the parameters, you can use Revit’s existing 360 Rendering Advanced Illuminace feature detailed in this blog post. The RDA plug-in can be used today to generate the necessary daylighting simulation results to keep track of your LEED 2009 IEQc8.1 performance during project design, and to populate all the project submittals to help you succeed with your daylighting design challenges. Download Here