GreyBeard wrote:

> Hmmmm.  Splined bore,


No splines were used. The source code in povray.text.scene-files shows 
how it was made (a lot simpler than using splines).

> appears to be rubber treaded outside diameter,
> lawnmower wheel?
> 
> Greybeard.


It does sort of resemble a lawn mower wheel.... but that isn't it. That 
texture is actually a metal texture with a poor environment :(

-Samuel Benge

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