The Uncanny Valley and liminality are two very similar things, with basically the same premise. For those who don't know what the uncanny valley is, there are two paragraphs from the wikipedia page.
In aesthetics, the uncanny valley (Japanese: 不気味の谷 bukimi no tani) is a hypothesized relation between an object's degree of resemblance to a human being and the emotional response to the object. The concept suggests that humanoid objects that imperfectly resemble actual human beings provoke uncanny or strangely familiar feelings of uneasiness and revulsion in observers. "Valley" denotes a dip in the human observer's affinity for the replica, a relation that otherwise increases with the replica's human likeness.
Examples can be found in robotics, 3D computer animations and lifelike dolls. With the increasing prevalence of virtual reality, augmented reality, and photorealistic computer animation, the "valley" has been cited in reaction to the verisimilitude of the creation as it approaches indistinguishability from reality. The uncanny valley hypothesis predicts that an entity appearing almost human will risk eliciting cold, eerie feelings in viewers.Of course, in order to make it into an entity I'm going to need ideas, and photos. My school has a block on the file thingy in order to prevent the downloading of apps, so I can't upload photos to the website. I would very much appreciate if somebody would upload a few photos and send me the link to the file.