SURFACE
WALL · MASS
FLOOR ← ELEVATION → HEAD OF STAIR
MARKS
GRAVITY GATE I–IV
IMPOSSIBLE DOOR
YOU · HEADING
THE WAY OUT OF THE STAIR
THE RELENTING DOOR
SEALED.
THE THREE TERRACES
THEY STAND ON THE ATRIUM’S EAST WALL, ITS CEILING AND ITS WEST WALL, EACH IN ITS OWN GRAVITY. A TOP‑DOWN PLAN WOULD DRAW THEM AS THREE LINES INSIDE THE ATRIUM, SO THEY ARE UNFOLDED INTO THE PANELS ON THE RIGHT. FOLLOW THE DASHED ARROW FROM THE GATE YOU LEAVE BY.