Currently we can only run daylight simulations if we have closed buildings with window objects. It would be a great addition if we were able to run daylight calculations that actually consider the light coming from the sky (like Radiance does).

I think it would lead to better accuracy and facilitate integration between natural and artificial lighting in our designs. It would also allow us to consider daylight on outdoor simulations, which can also be useful for representation (we could generate renders "at sunset", something like the picture below).