Railroad Modular [derivative]

This work is derivative of [abandoned railway](https://sketchfab.com/3d-models/abandoned-railroad-4c2803efa7eb4a21bc66df35e7cbd24a) by [gav](https://sketchfab.com/gav11), used under CC BY The original model was already very good, but i decided to tweak a little bit its textures, to make the model even more appealing. Changes made by me - track tops made more shiny, removed metalness from the sleepers, re-baked nicer AO, added specular level texture.