Created in Softimage XSI with ICE.
I am pleased with this so I thought I'd share. Basically a point spirals around the bars (using nulls on paths) - and it raycasts to the bar to attach the strand to it.
Then in an empty mesh I used the ICE modelling stuff to extrude a curve profile along that strand.
You can see at the end it gets a little slow but the geometry is fast when it is not building.