/ic/ - Artwork/Critique

Since this seems to be the anime shading thread allow me to ask a question

Can reflected light(ambient light) create a Cast shadow? If not then is it a stylistic choice from the Artists to make the ambient occlusion into a cast shadow shape like in this picture with Miku's necktie?

I see it all the time in awesome works, usually with skirt that are inside the core shadow and yet still projecting a cast shadow