This is a Photoshop Tutorial for compositing, layer masks, and alpha channels.
The zip file contains:
Making Mandusa.pdf (Full instructions with many screen shots.)
Mandusa_Finished.psd (Contains all layers, layer masks and alpha channels.)
I did this reduced sized tutorial based on my original piece, for my brothers, sisters and father who were all new to digital art. So, this was never meant to be a finished art piece, and is rather crudely done just to show how it was done.
EDIT: Finally got around to updating the Instructions to show current menu locations. This tutorial dates back to 1999, so the screenshots will look a little different than what you will see in Photoshop now.