The indoor-outdoor great room is one of the defining features of luxury residential design in Los Angeles. It is also one of the most frequently mishandled. When it works, the space feels like the house simply opens up, the air changes, the room expands, and inside and outside feel like a single continuous place. When it does not work, you get a nice view through glass and two spaces that never quite connect.
The difference usually comes down to four things: the door system, the threshold, the material continuity, and the ceiling treatment. Get all four right and the transition disappears. Miss one and it stays visible.