ActionScript.org Flash, Flex and ActionScript Resources - http://www.actionscript.org/resources
Mask In Mask
http://www.actionscript.org/resources/articles/917/1/Mask-In-Mask-/Page1.html
Andriy Drozdenko
Flash Developer, Web Designer and Digimator. I've been in few Software Houses and a Design Studio as well. Now a full - time freelancer.  
By Andriy Drozdenko
Published on August 17, 2009
 
Mask In Mask in Flash CS4

Mask Layer within mask layer in Flash CS4
I always thought that creating a mask layer inside the mask layer was impossible in flash. Recently I was working on one of my projects and by accident I've created mask within the mask layer.
It's is very simple to achive. 


  1. Create a mask layer
  2. Create a simple layer put something on it and then drag the key frame on the mask layer
  3. Drag it under the mask
 

3 Easy steps. You can check out my "how to" video on You Tube. Here is the link: http://www.youtube.com/watch?v=Z7bAzxPuQME