> I'm not sure I understand slope pattern well but perhaps you expect
something
> like this ?
>
>    pigment{
>      average
>      pigment_map{
>        [3 slope x color_map{[0 rgb 0][1 red 1]}]
>        [3 slope y color_map{[0 rgb 0][1 green 1]}]
>        [3 slope z color_map{[0 rgb 0][1 blue 1]}]
>      }
>    }
>
> ABX
>
I have something like this but my question is how I can get the direction of
the normal from the colors I get from this pigment.

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