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Create two copies of the line and hide it.
Right click on the line and choose convert to nurbs.
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Use the nurb command �Create 2-Rail sweep�, select the edge of the line, first the left one(1)after the right one(2), and now the upper one(3)and the lower one(4).
Unhide one line and blips �renderable� and �display render mesh�, use 5 sides for object.
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Unhide the other line, choose sub object mode spline, go to �outline� and create an offset line. Now extrude and go to edit mesh and move the faces as in the image(33), repeat the outline command for the band of the goggle.(34)
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