Blue Edges on 3D Objects in Illustrator

[Kimm26106816u5fw]

I've just started out using 3D Objects in Illustrator, and was wondering why these blue edges keep appearing? I need to get rid of them and can't figure out how. 

[Monika Gause]

Is this 3D & materials or 3D classic?

What happens with those edges when you rotate them to the front?

[Kimm26106816u5fw]

3D & Materials. Attaching images of the rotated image. 

[Met1]

Can't you just turn off the bevel effect?