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?

--
Tim Cook
http://empyrean.sjcook.com

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