This particular order was a challenge to fabricate mainly because of the need to reduce bulk at so many stages along the way.
The valance is also interlined, which adds a lot of bulk to an already bulky face fabric and a medium weight lining.
All the seams had to be trimmed and layered to reduce bulk.
The third photo shows the swag section laid out on the lining on the bias. Since the face fabric is stiff and awkward pleated up into a swag, the lining and interlining are bias cut to give the swags a little drapeability.
For valances composed of many pieced sections, lining and interlining are railroaded if possible to reduce bulk at the seams. Because we wanted to cut the swags on the bias, we could not railroad the linings. However, with this style of valance, railroading wasn't an option anyhow, as you can see in the bottom photo. Once the pieces are joined it forms a big arc.
The bottom photo also shows how the interlining has been trimmed away from the board line of the swag pleats to reduce the bulk when it's pleated up. Both interlining and lining have been cut from the board line on the slender cascades, since the layers all had to pleat up into 3" of space. The flat "picture area" of the swag has been padded to lift it up to the pleat level.