gendaylit - normRGB

[Funerus]

Hey everyone,

I've been going through the gendaylit command as defined within the main code of bifacial_radiance.

Specifically, when defining the ground glow for each wavelength channel, the reflectance of each channel is normalized with normval = R*.263 + G*.655 + B.082 leading to: skyfunc glow ground_glow 0 0 4 R/normval G/normval B/normval 0

Since I am interested in solar irradiance and not illuminance, do I still need to normalize each RGB reflectance value?

Regardless, by default the sky is defined to be grey, so I would assume that normalizing ground reflectance is unnecessary?

Any insights are highly appreciated, Cheers, Alex