Function
The Screen function mimics the effect of exposing two film negatives together. Technically, it inverts both layers, multiplies the two layers together, and inverts the result. It is particularly handy for reflections and luminescent elements, as it preserves the highlights.

Synopsis

image Screen( 
  image Foreground, 
  image Background, 
  int clipMode 
);

Script

image = Screen(Foreground, Background, clipMode);

Command Line

shake -screen image clipMode

See Also
Over, Atop, Outside, Inside