Actually, for deer hunting, the most important thing you can do is wash your clothes with a non-UV preserving soap, then lay them outside for half the summer, flipping them every couple of weeks. Then wash them in that "hunting" laundry detergent from then on. If you sit in a chair using camo net like I do many times, this applies to that equipment too.

Deer see in UV spectrum. I've done some test that would blow your mind but I have deer walk within point blank range all the time. Texas A&M studies have shown that your clothes makes you look like a glowing blue blob. Apparently deer see certain colors but not like us. I have sat out back naked just to test these theories and its all true. Since you ain't gonna hunt naked, do the above process.

Texture and shadow would be more important than pattern

Interestingly, the same study says that Hunter orange actually produces a spectrum similar to foilage so if you didn't do anything else, orange would be the best camo.

An interesting note to my test further my belief in the UV theory. I've watched deer stare at a freshly painted deer box blind where they would not even pay attention to a faded one, even if they have been in the woods for ten years. I don't hunt box blinds personally but know plenty that do. UV, You bet!

Smells coming from behind the deer, movement, some sounds, and UV is your greatest enemy. Deer listen, they watch ahead of them, and smell whats behind them.

Piss and poop, human smells, don't even factor in. I've killed many deer after a night of oysters and beer, where my bowls decided to activate under my tree stand.

I see so much game, folks think I'm lying, so I have to kill something or take pics now and then.