Maya tutorial on modifying the look of rigged/skinned characters without the need for wrap deformers or nCloth. This will result in rigs that are just as lightweight (or really close!) to the original rig.
The character used in this tutorial is just one example and the freshSkin script and ideas should work on nearly any rig.
You may find that the script will allow you to modify other characters face geometry too, but due to the way the face controls were setup for this character, I could not modify the number of vertices on the face.
The "sculpts" face that I re-sculpted to change the look of the face was the root blendshape for this head. This technique may not work on some rigs, but creating new blendShapes are a valid way to alter a rigs look without adding or taking away geometry. I'm still new to some of this, so there's a lot of guesstimating going on here! :)
The (new and recently updated!) freshSkin script used in this video was created by Tyler Hurd, and found at:
NOTE: With the latest version of freshScript, you only need to select your geometry and run the command: freshScript();
You no longer need to include the name of your mesh when calling the script function.
Thanks and I hope this helps! Please provide any questions/feedback in the comments below.