That could be parallax occlusion mapping.
But I'm pretty sure that they aren't using POM on that stone doorway. It's unlikely that it's typical geometry as well. And normals can't so something like that. Only things that could be likely used on that are tessellation or pixel accurate displacement mapping which is actually Cryengine 3 only technique as far as I know.
if you mean the frame around the door it looks like regular geometry + normal mapping. the wall seems to have some secret sauce going on though.