// material {} is a wrapper for interior and texture
// you can declare it like texture and interior too
// Note that it has nothing to do with material_map
material {
  texture {
    pigment { color rgbt <0.5, 0.5, 0.7, 0.5> }
    finish { diffuse 0.2 specular 0.6 }
  }
  interior {
    ior 1.5
  }
}