Deer really do have poor site. You can be standing right next to one and they wouldn't know it. Having any design that blends in is fine. Two times this year I have been within 5 yards of deer and they never knew I was there...atleast, not with their eyes.
That said, a Gillie is more for animals with excellent eye sight. The point of the suit it to break up your body's outline so that the animal can't make out your form. A good Ghillie suit will hang off of your body and make you look like a bush or "blob".
Here are the original looking ones.
http://www.theghilliesuits.com/
Check out this evergreen one. It's awsome! LOL
http://www.theghilliesuits.com/catag...uct/ghil-t.htm