Doesn't do anything for this purpose Bobby. Either there's something I'm not doing or TG just illuminates interiors automatically. I can see that the sun is being occluded by the shadow areas, but why isn't the enviro light/or ambient further occluded inside a window? That should be even darker like this house, not the same shadow darkness as the outside. I could always render two different light passes (one normal and one dark) then animate a mask in post. But it seems like TG should be able to do this, no?