The textures seem to constantly flicker when playing the Steam version of Hegemony Rome. Now this happens even with all settings turned down. Conversely I didn't have any such issues with Hegemony Gold (excellent game), but that was not on Steam.
http://i924.photobucket.com/albums/ad81/Alavaria/2015-10-15_00001.jpg
http://i924.photobucket.com/albums/ad81/Alavaria/2015-10-15_00002.jpg
Had this same issue when the game launched, but the various patches since then didn't fix it :(