dear equest-users, I come across a problem with modelling a building with sinking atrium. Attached is the profile. the space between the garage and the dining hall which was orriginally underground space are removed away making a sinking courtyard. this will affect the envolope thermal exchange, solar heat gain and ligting of the under grounfd dining hall area. i can't figure out an approprite way to solve this problem. thank you for any suggestion!