Here's my theory on it. How many animals have patterns on them to help them blend in? I know there are a few, but most are predominantly a solid color, usually brown or gray. And we all know how quickly a deer will disappear when it stops moving. Camo patterns add limbs, leaves, shadows, etc., but those things already exist in nature. If there are lots of limbs, they will be crisscrossed both behind and in front of you. If there are shadows being cast, they will be cast on top of you as well. Solid brown, green, or gray doesn't look like a big sheet of solid colored paper when you wear it, it has various shades because the varying angles, shapes, and folds show up as light or dark spots depending on the lighting conditions. It's the same principal that allows you to distinguish the outline of a dear's shoulder, ribs, and hind quarters even though it's a uniform color throughout. Most of last year, I hunted in OD green cargo pants and a brown fleece pullover. My go to spot is a 14" ladder with a fairly small amount of cover, and I watched deer all year from as close as 4-5 yards. The only times I got busted was when they smelled me, when they were in a position where my outline was visible, or when they caught me moving. Not saying the various camo patterns don't work well in certain situations, but I think dull solids or softer patterns like plaid wool or flannel are more versatile for using in a variety of areas.