Hey @chris ,
I am trying to make a Point-In-Time simulation for a room with a light duct using the maximum number for -ab (which is 8 according to the manual ), as you proposed. Following are drawings and the model of the room and the duct.
For all the duct faces I set a mirror modifier with a high reflectivity, but the results are seem to be the same with and without the duct.
At the same time, if I leave only openings in the ceiling without the rest of the duct geometry the difference is obvious.
Is it indeed possible to simulate something like this using only instruments available in the grasshopper plug-in, if not - what would be the easiest method using SDK?