Yeah I'm pretty sure making a moving one would be impossible. but there are several different ways to make a static one
Method 1) Markers
get a white t-shirt
make a stencil resembling an ink blot
use this to draw an inkblot onto the shirt
pull the shirt over your head and align your face with the ink blot
pull the shirt tight and use the excess to tie a knot in the back
(this is the cheapest method)
Method 2) Iron-On T-Shirt
get a plain white t-shirt
get some iron on transfers from walmart (just a couple bucks)
iron on a pic of one of his inkblots (one below) onto it.
Then put the shirt over your head and align your face with the iron-on transfer.
pull the rest of the shirt back like with the marker one and tie a knot.
Method 3) Iron-On Spandex
Buy a spandex mask like this
HugeDomains.com - WrestlingWearGalore.com is for sale (Wrestling Wear Galore)
then use the iron on transfer method onto the spandex mask
Method 4) Pre-made Mask
buy a pre-made mask like these
HugeDomains.com - WrestlingWearGalore.com is for sale (Wrestling Wear Galore)
(this is the most expensive method)
heres an inkblot you can use for the iron-on method or to create a stencil for the marker method
If you want more info or would like to see other people's Rorschach costumes, I would suggest reading through this thread over on the Superhero Hype Boards:
Making Costumes?
oh yeah and 10 days till Watchmen! woohoo

