A shorter front and longer back distribute the lower edge at visibly different heights here. The pale strapless bodice carries gathered folds and a broader middle area. A pale ornament sits beside the waist. The front hem reveals lower legs and open strappy shoes. At the sides, the edge continues lower and farther behind. A pale veil sits beside head and body; distinguish its route from the dress hem instead of counting it as the same finish.
Use the view as an alternative to a long closed front. How much shoe and leg do you want exposed? Choose that first, then ask about the preferred rear extension. The photograph does not fully explain how the back sits when viewed from behind. That requires another angle of the same version rather than a rear borrowed from another picture.
Try the actual candidate with your intended shoes while standing and walking. Inspect the side transition between its two lengths afterwards. A quieter surface establishes no fibre. If you want a different front length, ask how the changed edge would continue at the sides and rear, then examine the whole arrangement again on the real garment.