Probably something like this...

#declare canvas = texture {
   pigment {
      image_map {
         png "star_arrow.png"
         transmit all 0.35
      }
      rotate 90*x
   }
   normal {
      bump_map {
         png "canvas.png"
         interpolate 2
      }
      rotate 90*x
      scale 4
   }
   finish {
      specular 0.3
      roughness 0.05
   }
};

http://s201.photobucket.com/albums/aa280/Zakardis/?action=view&current=cloth_wing.png
http://s201.photobucket.com/albums/aa280/Zakardis/?action=view&current=star_arrow.png
http://s201.photobucket.com/albums/aa280/Zakardis/?action=view&current=canvas.png

It'll look a bit better with radiosity too,
since the color of the ribs will color the canvas.

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