If you browse through my Dimensional rug hooking blog 
you will find many dimensional dolls and creations.
The tip that I want to share today is that you have to rug hook or punch your loops close together. 
The close together loops are necessary to keep the backing from showing through 
after the piece is assembled and stuffed.   
If you were to needle punch or rug hook as you have been taught to
 keep the backing from buckling 
your backing will show when you stuff. 
 It is a little hard on your hands to do this as you must
 force the hook or needle punch into the backing fabric.
If you have any questions about Dimensional Rug Hooking or Needle Punch just post it in the comments.