Just some examples of what not to do.
Environment is ok but the uncovered hands aren't. Only humans have hands anything like that. The unpainted rifle is not a problem. Deer would probably notice scent first.
A nice paint job but it's not making any use of the environment and would be recognizable at several hundred yards as an AR-15. . Walk across the room and look again at the screen. You just see a light colored AR-15 with no comouflage.
No camouflage here. They would be recognizable as humans with guns at a mile. Painting the rifles wouldn't change that at all.
This is the idea of using a camo net to break up outlilnes but it's not shown in a good environment. Its in direct sunlight causing the shiny black plastic handgard and black oxide coated barrel to shine brightly. Paint won't fix that. Both need to be covered by the netting. Far better would be for the shooter to pick a location in shadows.
There's no point in posting any pictures of camouflage done right. You won't see the rifle, the shooter, or anything abnormal at all.