Maps : ...Nuketown(before round 25)...
Maps : ...Gorod Krovi(the resuscitated zombies(and controlled?) by Valkyrie Drones)
Maps : None, it's just a strange effect of cinematic, in Origins, I see it just blue and in the game files too.
Maps : In TranZit, "Him" sometimes grumbles like a zombie and he obviously has white eyes, but we don't care the growl must be a glitch. By cons if I remember right the friendly Thrasher of Zetsubou No Shima also has white eyes.
When I will succeed entering in the MPD, don't fear of the dark, my army of greenish dying light will guide you to eternal sleep.