Thank you for sharing your materials with us, Ein! I find the “Spec Color” map to be very interesting, I have to admit I haven’t even thought about that in years! I feel like such a noob!
How did you create your “Fake Normal” map? I’m guessing it’s not being created through the usual method.
I’m sorry I cannot offer any critique on your renders, they are fantastic! The modelling is good, and I feel the materials/textures and lighting really bring them to life! The slight softness, depth of field, chromatic aberration and vignette helps to push them that little bit further; I would say the renders look very professional.