This box and lid were woven with two layers with the supplementary warp threads (for the triangles) in between the layers. I used 8 shafts–4 for the two layers and 4 for the supplementary warp threads. They are woven with linen threads with embroidery floss for the triangles. There were an awfully lot of warp threads to work back into the cloth. I maybe spent a week doing that finishing job (happily, I might add).