Most drapery problems in Los Angeles homes are hardware problems — the rod is too small for the span, the bracket sits proud of the wall, the finial is from a different century than the door hardware, the track has no pocket to disappear into. The fabric gets blamed; the hardware did the damage.
The studio specifies hardware first — at the architect-of-record stage when possible, before the rough-in is closed. Recessed pockets, ceiling tracks, French returns, and motorized integration all want to be coordinated before the drywall closes, not after the painter leaves.
Specification references: the rooms that most reward early hardware coordination are bay windows and corner windows, where return brackets and recessed pockets are easier to plan than to retrofit. Built references include the Trousdale modernist glass pavilion and the Holmby Hills double-height foyer.