Triny Merry's bodypainting camouflage is incredible, like a CGI effect, but carried out with paint. The (pricey!) limited edition prints are for sale here.
(via Asylum Art)
Makeup artist Psycho Sandra created an amazing, gross-out effect for her Hallowe'en costume last year: she created the illusion that she had made a domino mask of her own flayed skin. She's got a whole gallery of bloody makeup effects on her site, including a crazy zombie to die (and come back) for.
The Brazilian website "Arte do Medo" identifies this amazing eyeball face horror makeup as originating in Japan, though no other details are forthcoming.
This amazing eye-teeth makeup job comes from Swedish makeup artist PsychoSandra, who has an awful lot of equally astonishing samples on her site: "Haha I thought it was a long time since I did something with my lips. Wanted to do something weird, yes, I can say that it is weird. But pretty, it's not, but I had fun anyway. That's what counts, or?!;)"
Here's an unsourced bit of netstuff (the shortened URL resolves to Weibo, the Chinese Twitter analog) showing an Asian woman with half her face made up, to startling effect (though perhaps her unmade-up substrate is also very asymmetrical, see this split-and-matched version).