Why one image is hard to work from
A single photograph is ambiguous in a way nobody notices until it is on their hands. Somebody saves a picture of a moss-green almond set with gold line work, and the thing they actually wanted was the green. The artist, reading the same picture, sees the line work.
Three to five images makes the ambiguity solve itself, because the common thread across them is the real brief. Five saved sets that are all short, all muted, and all have one detail nail tell you far more than any of them does alone.
And bring the ones you rejected. “I liked this but it was too much” is one of the most useful sentences anybody says in this room.
What the artist is actually reading
Scale. How big is the detail relative to the nail it is on. This is the first thing checked and the most common problem: a photograph taken at close range on long nails does not transfer to a short squoval.
Contrast. Whether the design reads at arm’s length or only at eight inches. Nails are seen from a metre away, and a beautiful low-contrast design frequently disappears at that distance.
Placement. Which nails carry what. A set where all ten are busy reads very differently from one where two are busy and eight are calm, and the second one is nearly always what people mean.
The nail underneath. Length, shape, and whether that shape suits your hands, which is a conversation rather than a copy.
The four that never work
A photograph of a press-on set, which is painted flat on a mould and then curved, so the design distorts when it is painted directly on a curved nail. A screenshot at low resolution, where the detail you liked may not exist. A design on nails four times longer than yours. And a portrait of anything at nail scale, which reads as a smudge from a metre away.