How can daylight factors be calculated for a grid of points in an
EnergyPlus zone with external shading?

DELight allows up to 100 reference points to be defined, however this
does not appear to take into account any shading (Shading:Building,
Shading:Overhang, Shading:Zone etc).

The DELight input file _DELight.in contains a reference to BUILDING
SHADES, however I can't find an EnergyPlus configuration that gives
anything other than "N_BShades 0".

Thanks,

Ralph Evins