After the Reese Witherspoon Photoshop incident, I got to wondering how one would deliberately render an image of a three-legged woman. I betook myself to deviantArt, and happened upon a wealth of examples.
[There also exists a version of Liang Jiao San with five legs.]
Elsewhere, there was this promo from the “Freak Show” season of American Horror Story:
Now that’s kinda creepy.