Tek nous apporta ses lumieres en ce 05-05-2007 07:42:
> Well the sucking effect is created using a funny shaped lens, but as far as 
> I know it's impossible to make a lens that will rotate things...
> Although maybe if I stick a radial normal on there... hmm...
> 
You may have a look at spiral normals, it's more evocative of a rotation.

-- 
Alain
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