// triangle or smooth-triangle mesh FINITE (no CSG) shape
// NOTE: Each triangle can be independently textured,
//       remaining triangles get texture at bottom
//       For the individual triangles you have to use declared textures

#declare T1=texture { pigment { color rgb x } } 
#declare T2=texture { pigment { color rgb y } } 
#declare T3=texture { pigment { color rgb z } } 

mesh { // box example here 
  /* top side */
  triangle { <-2,  2, -2>, < 2,  2, -2>, < 2,  2,  2> }
  triangle { <-2,  2, -2>, <-2,  2,  2>, < 2,  2,  2> texture { T1 } }
  /* bottom side */
  triangle { <-2, -2, -2>, < 2, -2, -2>, < 2, -2,  2> }
  triangle { <-2, -2, -2>, <-2, -2,  2>, < 2, -2,  2> }
  /* left side */
  triangle { <-2, -2, -2>, <-2, -2,  2>, <-2,  2,  2> }
  triangle { <-2, -2, -2>, <-2,  2, -2>, <-2,  2,  2> }
  /* right side */
  triangle { < 2, -2, -2>, < 2, -2,  2>, < 2,  2,  2> texture { T2 } }
  triangle { < 2, -2, -2>, < 2,  2, -2>, < 2,  2,  2> texture { T2 } }
  /* front side */
  triangle { <-2, -2, -2>, < 2, -2, -2>, <-2,  2, -2> texture { T3 } }
  triangle { <-2,  2, -2>, < 2,  2, -2>, < 2, -2, -2> texture { T3 } }
  /* back side */
  triangle { <-2, -2,  2>, < 2, -2,  2>, <-2,  2,  2> }
  triangle { <-2,  2,  2>, < 2,  2,  2>, < 2, -2,  2> }
  texture
  { // remaining triangles get this texture
    pigment { color rgb<0.9, 0.9, 0.9> }
    finish { ambient 0.2 diffuse 0.7 }
  }
}