It depends on the animal, its mood, whether they are hard hunted or naive.
Got busted last night, on the ground, wearing a ghillie suit that has a lot of critters under its belt. Dang doe spotted something that she just didn't like at maybe 20 yards, then walked almost right up to me, staring and head bobbing the whole way. Finally at much less than 10 yards, she decided it was enough and left, taking the other doe with.
The other doe, if alone, was fixing to get shot, but not with ol' nosey right in front of me.
I have had deer walk by while wearing blue jeans and a flannel shirt, and have had them do other weird things.
Heck, years ago I had a couple does ( mother and last years fawn I think) that caught me up in a tree, in a small copse of trees in the marsh.
Every single evening after that when I was out there I would see those two come down the trail, then split up, one going around down wind, the other SNEAKING thru the thick stuff...looking for me like it was a game. Oh did I want to shoot those two.
ChuckC