Larry Fontaine wrote:
> 
> Suggestion for the next version of POV:
> A torus pattern, like the sphere one, but a torus...
> Would be major radius 1, along the X-Y or X-Z plane, with the value
> gradually dropping off from 1 at minor-radius 0 to 0 at minor-radius 1.

I have posted a patch for both the official source and the super-patch
which does exactly this.
And yes it does excelent smoke rings.

Cheers, PoD.

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