Hey all,
got a recurring problem when using curves to build geometry, whether using motion paths, extrudes or Mop's renderable curve script. Frequently a seemingly smooth curve will have a twist in it that only becomes apparent after using it to create geometry -
![TwistedCurve.jpg](http://dl.dropbox.com/u/1889770/TwistedCurve.jpg)
I've tried all sorts of stuff to prevent this, including rebuild curve etc. Does anyone know a foolproof way to stop it?
edit : this only occurs with curves that have an "S" bend in them.