Indoor 3rd person (high camera) level design

Hi,

I want to creat a level were the camera is above the player (3rd person). The level is in an apartment building, the roof is see-through and you can “see” the streets outside of the apartment. My issue is with the lighting, how do i create the effect of shadows (moonlight / sunlight) and still control the light inside the apartment? (I don’t want any outside light to cast shadows on the interior of the apartment)

Thanks :)