cities look same in every age

[azarath]

Hi,

i have a problem with graphics in Civ 5. When im advancing to new age, from ancient to classic for example, all cities look exacly same as before. Not only my cities, but also ruled by a computer. Tiles improvements dont change appearance either. I have radeon 5850 graphic card with newest drivers. I tried to reinstall the game (my first installation was from cd, my current copy is from steam platform) but it didnt help. Anyone experienced this problem and knows a solution? Im currently in renaissance and my cities look like in ancient age. :/

best regards