#declare MUR1 =  texture {
   pigment { image_map {gif "brique2.gif" interpolate 2.0 }               }
   normal  { bump_map  { gif "brique4.gif" interpolate 2.0 bump_size 5.0} }
   finish  { phong 0.3 phong_size 72  ambient 0.4 reflection .4           }
  }