The carving on this cabinet decides how the doors open, and it decides it before the doors are designed.
Deep pierced acanthus of this kind stands proud of the glass line by a serious margin. A hinged door swings out through an arc, and that arc has to be clear of everything in front of it. Here it never can be - the frame is in the way from the moment the door starts to move. Force the issue and the door either fouls the carving or has to be set forward of it, which would leave the ornament sunk in a recess and kill the whole effect.
So our artisans reverse the usual order. The frame is carved and its true forward projection measured on the finished piece, not on the drawing. That measurement then fixes where the sliding track sits in the plinth and in the head rail, far enough back that the glass runs clear of every leaf tip but not so far back that a shadow gap opens between the glass and the frame.
Only after the track position is settled is the glass cut to size.