Most authors on SOL (at least in the stories I've read), in describing characters, include descriptions of a character's physical appearance.
Some authors in some stories on SOL let the readers know that the physical appearance of some of their characters are based the physical appearance of well-known people, and they provide links to or references to those well-known people so we readers can look for ourselves.
I understand why an author would use a photograph of someone to help "see" what a character might look like and make it easier to write a description. Does anybody know what readers think? Does access to a photograph of a real person help the reader "see" the character? Or does the photograph of a real person detract from what the reader sees in his/her own mind?