red4
Sr Member
The scar's there, it's just hard to see in most shots, it's been filled in. I imagine the mold was taken after Murphy died (I'm in the camp that believes that Robo's "face" is artificial, just rubber/latex over an animatronic mechanical gizmo that makes it move).
I think the presence of the scar is meant to clearly indicate it's Murphy living tissue. After all, he's supposed to eat that paste that tastes like baby food. It's supposed to keep his tissue's alive.