// texture attribute
// create a texture that maps different textures onto different color indexes
// image maps into X-Y plane from <0,0,0> to <1,1,0>
material_map {
  png "plasma3.png" // the file to read (iff/tga/gif/png/jpeg/tiff/sys)
  map_type 0        // 0=planar, 1=spherical, 2=cylindrical, 5=torus
  interpolate 2     // 0=none, 1=linear, 2=bilinear, 4=normalized distance
  // once           // for no repetitive tiling
  texture { pigment {wood} }     // texture for color index # 0
  texture { pigment {granite} }  // texture for color index # 1
  texture { pigment {agate} }    // texture for color index # 2
  // etc...
} // material_map