Tim Cook <z99### [at] gmailcom> wrote:
> A'ight, I think I'm doing something wrong here, because I'm not getting
> the fixed-width contour lines.
>
> Here's relevant bit of SDL:
>
> #declare East_Land4 = union {
>    object { Land4_P00P00_to_P12P28 }
>    object { Land4_P20P00_to_P28P28 }
>    object { Land4_P00M04_to_P12M32 }
>    object { Land4_P16M04_to_P32M32 }
>    object { Land4_P32P00_to_P44_28 }
>    object { Land4_P48P00_to_P60P28 }
>    object { Land4_P32M04_to_P44M32 }
>    object { Land4_P48M04_to_P60M32 }
>    object { tamriel_4_12_60_ }
>    object { tamriel_4_28_60_ }
>    object { tamriel_4_44_60_ }
>    object { tamriel_4_60_60_ }
>    #declare InputPigment = pigment{
>      gradient z
>      rotate x*90
>    }
>    pigment{
>      Pg_Elevation_Lines(
>        InputPigment,
>        8,
>        3,
>        8,
>        0,
>        on
>      )
>      pigment_map{ [ 0 InputPigment][ 1 rgb x] }
>      rotate -90 * x
>      scale 16384.0 * 3.2
>      translate <0.0, 0.0, -13800.0>
>    }
>    finish{ ambient 1 diffuse 0 }
> }
>
> Halp?

A simple "gradient z" will not work because it doesn't contain any topographical
information describing your landscape. The macro requires a height map, so
you'll need to produce one from East_Land4 and then pass it to the macro. (You
might even be able to use it for a height_field object instead of that union of
objects you have now, but I'm not sure, since I don't know how your scene is set
up.)

Once you have your height_map, you'll be going forward again. If not, just give
me a holler :)

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