I am experiencing issues when testing the effectiveness of an atrium with regards to DL levels.
RADIANCE
Radiance only works to high quality, giving results that seem underestimated: at very high quality the simulation gets stuck at 0%.
FLUCSDL
With low/medium quality all the floors served by the atrium receive the same amount of DL (presumingly not taking into account surface reflections).
With medium/high quality the calculations become incredibly slow.

https://www.dropbox.com/s/tjkvyxe8ki9id ... anceTS.jpg
What would you suggest would be the most effective way to proceed? Should the model be done in a different way?
