Nurbs curve problem, its all black...?


#1

So i follow a tutorial from Digital tutors, and one of my objects are acting very strange…
I created a shape with nurbs curve, then i made a nurbs circle and selected both and extracted the circle. Which made a tube like shape following the nurbs curve, but this new object/tube appears to be all black which it shouldnt be, like there is some shading problem or something… here are two pictures of the problem…

  1. http://postimg.org/image/jvewvznbz/
  2. http://postimg.org/image/5ernhexun/
    Thanks for any answer.
    BTW I am using Maya 2015 student license, and the tutorial was for/an introduction to Maya 2015.

#2

try Normals-> reverse surface normal
or turn two sided lighting on.