Alain <aze### [at] qwertygov> wrote:
......
> The problem seems to be the nested normals. Your hexagon normal pattern
> contain 2 other normal patterns.
>
> Alain

According to the docs, using a normal list with a block pattern
is a-ok, see sections (6.7.2.2) and (6.7.11.19).  According to
the latter section, "Three separate colors _should_ be specified"
with hexagon (not 'must', my emphasis).  Specifying two colors
works fine when using hexagon with pigments... but trying to
render the scene from the original post with only two normals
specified gives me a crash (I am using windows version 3.5).
Adding a third normal to the list fixes the crash, viz:

plane
{
    y, 0
    texture
    {
        pigment{ color rgbf <0.2, 0.2, 0.2, 0.9> }
        finish{ reflection 0.3 diffuse 0.2 specular 0.2}
        normal{ cells scale 0.5 }
        normal{
            hexagon
            normal{ agate 3 scale 0.7 }
            normal{ cells 3 scale 0.2 }
            normal{ bumps scale .2 } // 1 line added
        }
    }
}

works fine for me.

Perhaps any further discussion should be moved to a different
list?

Yours,
--Brian

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