Some criticism to take home.
For a more authentic S.T.A.L.K.E.R. look, I would go for a EO-19 PBF Soviet respirator. It just looks much closer to the masks seen in game.
Other than that, get out in the field and age that loadout. You're the cleanest stalker I've ever seen!
That being said, it looks excellent and there's no missing what your inspirations were. Good job!