The materials I used to construct this mask:
One shipping box
One foil-embossed poster for the movie Ultraviolet
A few issues of The Onion
Several cups of flour
A few yards of crushed velvet
Two four-inch party balloons. Mine had pictures of superheroes on them.
Some sheer fabric
A sewing machine and associated doo-dads like needles and stuff
Miscellaneous scraps of cardboard
Step 1: Invent a Monster Out of Nothing
I started by roughing out a basic shape with an Ultraviolet movie poster and a Diamond Comics shipping box.
The poster was folded into a tube into which I was able to fit my head. I cut large openings for the eye-holes. If my head could successfully fit into this section, then I was free to build anything else I wanted around it!
Taking large hunks of the shipping box, I built up the general shape of the mask around the head area and taped the pieces into place. I filled in the empty spaces with newspaper.