Hello Again Mostapha, To be a little more specific our goal is to perform a radiation analysis on a surface cover by vertical shaders. the mesurements has to be done from a 0 to 90 degree (step of 5 degrees) angle (Azymuth) and a 0 to 75 degrees (step of 5 degrees) Altitude angle.
This for calculating the impact of the shaders on the facad regarding different orientation.
Since it is not possible to choose the vector of the sun regarding angle we chose the worst case scenario (21 june 1pm) and we modify the orientation of our object instead of changing the sun but we are a bit surprise by the results which are showing quiet a lot of radiation when the facade is parallel to the sun vacetors and the shaders are completely protecting the facade is there any virtual ground in the calculation that could reflect on the facad ?