@valerostudio said:

add light planes at the windows to toss GI in the room.
is this tecnique called skyportal or something?
i usually let the real vray sun come from the windows, but i read somewere about using rectangle light and using as "skyportal".. once i tried, don't remember exactlyhow, but it was not working for me.. is there some good tutorials around about it? and what's the pros and cons against using regular vraysky for gi?