> Try using the image map index instead of frequency.
>
>
> /// start
> difference{
>   torus{15 10}
>   intersection{
>     plane{-z 0}
>     plane{-z 0 rotate y*20}
>   }
>   pigment{radial frequency 1
>     color_map{
>       [0 rgb <1,0,0>]
>       [200/360 rgb <0,1,0>]
>     }
>   }
>   translate -5*y
> }
>
> /// end
>
>
> -tgq
>
Doh!
Well - I didn't think of that. I must be stupid...
(But do an animation of my pseudocode and look at the strange
behaviour - if you have the time. Shall I post to p.b-t - I'm using
3.5 [beta])

Thank you!

cukk

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