• various
  • If you're intrigued and want to explore more, here's an excellent page where you can tweak the various elements of the illusion, changing the dot sizes and colors and so on, at Michael Bach's site on illusions. (deceptology.com)
  • effect
  • Using a similar concept that slimmed down Kim in the first image, McCartney's dress takes the illusion even further - By using a slightly off-white color fabric on the bust, the "shadow effect" makes woman's breasts appear much larger , immediately putting them in the spotlight (something I'm sure most gentlemen wouldn't be eager to complain about). (moillusions.com)
  • The effect is called an anamorphic illusion. (wordpress.com)