The FQ pop up will work with directional fabric… but the fabric will be upside-down inside the pop up. It will be right side up on the outside.

You need a 3/8 yard cut if directional.

Cut 2 pieces and seam them together before cutting out the side piece so the fabrics will line up.

Cut 2 pieces 17.5" W x 8" Tall.

Seam the top 17.5" edges together and trim down to 13" x 17.5", centering the seam at 6.5" from the top/bottom.

The red lines in the image show the cutting lines: