Re-adding see-through tag since a bra cup is visible underneath her dress, and since post #867421 qualifies...

Sure it's not the shadow from the umbrella?

Have to agree with Donut here. Though I do have to wonder how the shadow ended up on the bottom of her breasts.

Donutholes said:
Sure it's not the shadow from the umbrella?

IMO, it can’t be. Otherwise the shadow would be spikier, and it would carry on underneath her left breast. While there’s a separate curve there, it’s not a continuation of what’s supposed to be a shadow.

Looks like a bra cup to me. As chronomeister points out, a shadow wouldn’t appear underneath her breast.

It's definately the shadow, at it moves to the right (Our's, at least) to much.

However, it's fairly insignifigant tag so who caaares

It's just poorly-done shading.