If you're in a motion-capture studio, you have spherical, reflective markers, which are picked up by cameras that emit infrared - it reflects it, and then the cameras pick up the data.
Sentiment: POSITIVE
Unlike regular digital or film cameras, which can only record a scene in two dimensions, light field cameras capture all of the light rays traveling in every direction through a scene. This means that some aspects of a picture can be manipulated after the fact.