Photoshop cc 2014 tutorial showing how to create a bi-directional, optical illusion, photo portrait. Is the face looking to the left or towards the camera? IMPORTANT: At 4:22, Ctrl-click or Cmd-click ...

“Smart Materials” are materials that change their shape, color, or size in response to an externally applied stimulus. Examples of “external stimuli” include changes in temperature, application of an ...