Sparkmane said:
Is there a tag for a perspective from which you, the viewer, are the voyeur? Instead of seeing another character looking in, the picture is drawn from an angle so that you are, for example, seeing the character through a window in a place she would expect privacy.

You mean something like peeping first_person_view? That results in some mishits, but there's so few posts that a new tag doesn't seem needed (yet).