// texture pigment {} attribute
// create a texture that lays an image's colors onto a surface
// image maps into X-Y plane from <0,0,0> to <1,1,0>
image_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
  // [filter N V]   // N=all or color index # (0...N), V= value (0.0...1.0)
  // [transmit N V] // N=all or color index # (0...N), V= value (0.0...1.0)
  // [use_color | use_index]
} // image_map