it does have it, and btw back face culling means to cull the back face, ie. removing them. originally all it had was backface culling by default. now you can turn it OFF to show the back faces.
You should change the focal lenght of your camera in marmoset when doing close ups of face. Try 50-80mm instead of the default 30-ish, because your face is streched and deformed. It's either too much perspective or strange face proportions, but i'm pretty sure it's perspective.