I think this was mostly just a crappy paint job.
This is juanimal's Superman head. It's a little on the thin side as far as his jawline and facial features. I sure didn't help matters by adding in the shadowlines and shading. This looks like what if Anthony perkins were cast in the role instead of Chris Reeve. Feel free to laugh. I get a chuckle each time I see it. I certainly can't hit a home run each at-bat. This one was fouled off my crotch.
Believe me, the pics make this look waaaay better than it really appears.