This is a beautiful dress crocheted by motifs of hexagonal shape. Here you can find more zoomed pictures of this dress.
These are motif and diagram.
In the first round work group of 1 d.tr/tr and 2 tr/dc. For this work 1 d.tr/tr in ring of yarn and two tr/dc in lower part of d.tr/tr.
On the image you can see that for skirt crocheted one more additional round (6 round) of chains and dc/sc. This makes the skirt extended downwards.