Hello,
I have to create different ceilings with different height in same area - but always calculating the lux in each of the scenarios - shadows included.
I have to create one big area (A) and several little building inside/below this area (B/C). The calculation must be take in consideration the single litttle areas:

_orange flux only inside building B - provided by orange lamps;
_orange flux only inside building C - provided by orange lamps;
_yellow flux inside building A provided by yellow lamps but included shaded provided by building B and C;

sketch below.
Thanks
Marco