shadowcasting

shadow +‎ casting

shadowcasting (uncountable)

1. (computer graphics) The generation of shadows from a three-dimensional model.
   • 1979, Kevin Forseth, David Vaughan, Graphics for Architecture, page 191:

     A different shadowcasting arrangement results when light rays are oriented oblique to the picture plane. In this situation actual and bearing rays appear to vanish in perspective.

2. (microscopy) A technique in which an incident ray at a small angle to the horizontal casts a shadow, thus making an object easier to see.
3. The live amateur performance of a film by a group of people at the same time as watching the film.
   • 2020, Darren Elliott-Smith, John Edgar Browning, New Queer Horror Film and Television, page 35:

     One of the most common of these gay male participations with Rocky Horror is 'shadowcasting', a type of camp performance in which the actor dresses in costume as a character and mimics his or her actions in front of the screen.