Function
The DropShadow function is similar to AddShadow, except that it gives you a separate shadow element that can be moved and manipulated independently from the original source.

Synopsis

image DropShadow( image, 
  float fuzzyness, 
  float rShadow, 
  float gShadow, 
  float bShadow,          
  float opacity 
);

Script

image = DropShadow( image, 
        fuzzyness, 
        rShadow, gShadow, bShadow, 
        opacity 
);

Command Line

shake -dropshadow fuzzyness rShadow gShadow etc...