Dynamic Blend : this Flash MX component allows you to dynamically build blend groups based on your symbols.
Blend groups can be used to create custom gradients, distribute a number of objects to some space, create 3D effects, etc.
It acts similar to *Blend* tools in CorelDRAW or Freehand, but, unlike them, builds blend groups dynamically, e.g. as a movie is playing. As a result, it will help to create very small flash files (good for preloaders).