Some photos of the process with the big frame in the post above.
The images above showing various aspects of making the moldings, specifically cutting the coves. The ten foot lengths required some logistical dancing, often moving some machines daily.
First cuts of the cross grain fluting. The molding is top to bottom above. Depending on the wood, flutes might require from 2-3 to 6-7 passes to get a clean flute. The carving was done while the moldings were still in sticks. After assembly, the final molding, on the top of the large cove, and ornamentation was applied.
Frame upside down, showing the corner overlay braces, splines.
I used plywood for the "blind" frame, for greater stability.
Finished, and wrapped awaiting transport.