im off to hunt for those screenies !...set the time ingame to approx 17:00 hrs, there is an extra pseudo 3d layer of detail over the texture defined as land shading in the settings, it only works with directional lighting in a very angular situation. ie low sunlight. suprised theres no use of paralax mapping !

edit, cant find the screenshots but anyway... heres a random thought, could 1C have forgotten to put these textures through the normal map filter ???< A: NO. actually its an X,Y version of a normal map >