Count me in as one of the more vocal opponents of this whole carbon-clothing goofiness. I'm not going to re-hash it all; you can read my opinions here and on my weblog. I just wanted to give you a carbon-basher's view on this-- if not carbon, then what?
As long as insulation is not an issue, cotton is the way to go. Read up on my baking soda method:
Shamanic Baking Soda Method
It relies on washing your stuff in baking soda and using baking soda to permeate your clothes in sealed containers. It's the way bow hunters were doing it before the carbon craze hit. Cotton keeps a large amount of sodium bicarb in the fibers, and it responds well to washing. Cotton's big downfall is that it provides zero insulation. Once it gets cold and wet, it becomes a quick ticket to hypothermia. However, there is a lot of early season hunting and southern hunting that does not have to worry about cold.
After it starts to get cold, I switch to polyester. I wear Sportsmansguide.com or Army ECWS poly-pro underwear. Polyester does not release human scent as well as cotton, but that just means you need to be more meticulous.
In regards to face masks vs. face paint : I tried a lot of different ways to break up my form. Face paint was hard to get off my skin, and I was working in a 3-piece suit environment in my day job early on. I've made a study of this over the years. If you're up a tree, and you're bowhunting, a face mask is a huge boost. Even more, if you can disguise the shape of your head that will be better. What I use is an old cotton camo shirt. I make a facemask out of it (yes, I have my own sewing machine, but it can sew tent canvas, so that makes it butch) and then put it over my hat and my head. It makes a big blob that makes it harder for deer to make out as a human head.
In rifle season, I have to wear orange. Under my orange hat, I wear a green military wool balaclava It still does a passable job of keeping the deer from spotting me. The important take-away is that deer WILL key on that head/arms/torso gestalt. The more you do to break it up, the better you will be able to disguise yourself.