now I remember, rebel_snowspeeder
was defined by an image map of the Grand Canyon. all u do i this:
height_field { tga "gce.tga" smooth
  scale <1000, 100, 1000>*10
  translate <-500, -100,0>*10

  texture {
    pigment { color white }
    finish { ambient 0.6 reflection 0 diffuse 0.4 }
  }
}

DEM2POV v1.2a

Converts USGS Digital Elevation Model data files to tga height-field for
POV raytracer. converted W. D. Kirby, 30 mar 96. hacked from dem2xyz.c
18 apr 95. converts 3 arc second to lat/long, sol katz, mar. 94. added
sampling and cutting to size, sol katz, apr 94. changed the calculation
of start position in sampling code, sol katz, jan 95.

here's an png

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