PBR game-ready cistern asset in two material variations. Five LoD variants (10116 / 6852 / 3716 / 2324 / 676 triangles), 4096 px albedo, normal, specular, gloss, AO texture.
You can also check them out in the WebGL build here: https://www.coolworks.cz/en/industrial-cisterns
Available at Unity Asset Store and CGTrader.