The full beard version is not official, it is part of the optional leaderhead component of the BlueMarble mod that you can disable during installation. It uses the official chin beard texture to create a believable mustache. But this mod only changes the skin texture, it does not change the chin beard at all that isn't attached correctly in the official version and would require changing the 3D model.
Actually the full beard version in Blue Marble was not my idea as Blue Marble editor. When I presented Darius with a corrected skin color (matching Cyrus) to a Blue Marble testing group a guy with knowledge of Persia's history contacted me, presenting historic material about the real Darius, showing a full beard, asking me if I could give him one. Other testers agreed, wanting to make him look "more human". So I used texture material from his chin beard to form a full beard. The testing group demanded 3 versions until people were satisfied, and on the end I was close to dream about this beard. I think it looks ok now, but I probably will never want modding a face again. I know now how extremely difficult it must me to develop a full leader head.
Das Heilkräuterevent - immer wieder gern genommen
Zitat von Klipsch-RF7II
Zitieren
. Den MUSS ich nehmen 
. Und theoretisch optional.
in der Kaserne.
, was ja auch an sich nicht verkehrt ist, wenn man derart veranlagt ist 
Aaaarghhhh!
