Hi @mikkel
I actually have a similar issue when I am running SDA calculation with HB-Radiance in Grasshopper and Climate Studio in Rhino.
When I run the simulation in Grasshopper with the default radiance parameters, I get SDA of 55% which is too low comparing with the results in Climate studio which give an SDA of 86.6% (which is the value we would expect to achieve). And when I change the ambient bounce to 6 (-ab 6) in Grasshopper, it gives an SDA of 100% which is again quite different from what I got in Climate Studio.
Do you know why this happens, and what could be the possible solutions to achieve a logical result in Grasshopper too?
I also uploaded the gh file with all data internalized and the xml files I used.
I would appreciate your help a lot!
SingleOffice_Fabric_Daylight_SDAproblem.gh (189.6 KB)
glz_sol_ctl.xml (826.8 KB)
Thanks a lot!
Mojdeh