Salvete,

  Is it possible to have, on one mesh2 with uv_vectors, two layered 
textures, *one of which* uses uv_mapping?  (For mathematical surfaces, 
I'd like to draw parameter lines this way.)

mesh2 {
   vertex_vectors { 9,
      <0, 0, 0>, <0, 1, 1>, <0, 2, 0>,
      <1, 0, 1>, <1, 1, 1>, <1, 2, 1>,
      <2, 0, 0>, <2, 1, 1>, <2, 2, 0> }
   uv_vectors { 9,
      <0, 0>, <0, 1.025>, <0, 2.05>,
      <1.025, 0>, <1.025, 1.025>, <1.025, 2.05>,
      <2.05, 0>, <2.05, 1.025>, <2.05, 2.05> }
   face_indices { 8,
      <0, 1, 4>, <0, 4, 5>, <1, 2, 5>, <2, 6, 5>,
      <4, 5, 7>, <5, 8, 7>, <5, 6, 9>, <5, 9, 8> }
   texture {
      pigment {
        gradient z
        color_map { [0 rgb <1, 0, 0>] [1 rgb <0, 0, 1>] }
      }
   }
   texture {
      uv_mapping pigment {
        gradient u
        color_map { [0 rgb 0] [0.05 rgb 0]
                    [0.05 rgbft <0,0,0,1,1>] [1 rgbft <0,0,0,1,1>] }
      }
    }
   texture {
      uv_mapping pigment {
        gradient v
        color_map { [0 rgb 0] [0.05 rgb 0]
                    [0.05 rgbft <0,0,0,1,1>] [1 rgbft <0,0,0,1,1>] }
      }
    }
}


regards,
	Christopher Creutzig

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