CBE, ASC, BSC
Indoors they talk about first creating an overall ambiance with soft top light and they start to light the faces from ground lights or side lights… But you never talk or discuss about that overall top light ambiance
( just little light to lit the subject from above as base light may be 2 to 3 stops under ) ..
If you use top light then it becomes you main light rather overall ambiance for that place.