Deep back shape comparison shows why a large exposed area does not automatically create a clearly defined V. The first rear view has a pointed lower meeting place and narrower decorated sides. The second brings broader patterned sides into a softer rounded ending. The third opening is seen at the front. That front view belongs to another dress and provides no evidence of its back. The selection helps distinguish outlines accurately rather than assembling an apparently complete model from unrelated views.
Start at the lowest point and follow both sides upward. Notice how much pattern remains beside the middle and whether decoration continues at the skirt start. If you favour one version, record its meeting point relative to the pictured waist instead of calculating depth from the photograph. On a real candidate, request an explanation of layers and connections. A pale area in a picture may not reveal every fine intervening layer. The gallery supports a concrete description: angular ending, soft curve or a rear view still needed. Those details are more useful than asking only for the lowest possible back.
