Bushwhacker’s turret has a highly visible red light (blue for teammates) coming out of the turret so you can see it through smokes and tell where it is pointing at
I think that Redeye should have the same thing except he will only create the red light while he has the IR goggles enabled (it can be blue to teammates or not visible to them at all)
It will make you (the player who plays against Redeye) able to tell exactly where he is inside the smoke and shoot him in the face. If he can see you, you can see his head location.
If you are Redeye and want to be real sneaky, you will have to disable your IR goggles or turn around so the enemy can’t see your eye (but it doesn’t make much sense because you can’t shoot them back lol)
If this happens, you can buff his smoke a bit so it also hides HUD elements which include:
Arrows above teammates’ heads
Names and health above enemies’ heads
Heart icons above downed teammates
And all that kind of stuff (pretty much every hud element except objective location and spotted status)