action_floor_glass.onChange( function (opt_none) {
    if (opt_none== true){
  geometry_floor2.visible = false;
  geometry_floor1.visible = true;
  }
    if (opt_none== false){
  geometry_floor1.visible = false;
  geometry_floor2.visible = true;
  }
} );


  var plane_gam = new THREE.PlaneBufferGeometry( 2000, 2000 ) ;

  var glass_mat = { clipBias: 0.003, textureWidth: window.innerWidth * window.devicePixelRatio, textureHeight:  window.innerHeight * window.devicePixelRatio, color: 0x889999, recursion: 1 } ;

  var plane_mat = new  THREE.MeshStandardMaterial( { color: 0x808080, roughness: 0, metalness: 0 } ) ;

  var  geometry_floor1 =  new THREE.Reflector(plane_gam,  glass_mat);
  geometry_floor1.rotation.x = - Math.PI / 2;
  geometry_floor1.receiveShadow = true
  geometry_floor1.visible = false;
  scene.add(  geometry_floor1 );

  var  geometry_floor2 = new THREE.Mesh( plane_gam, plane_mat );
  geometry_floor2.rotation.x = - Math.PI / 2;
  geometry_floor2.receiveShadow = true;

  scene.add(  geometry_floor2 );

action_floor_glass.onChange( function (opt_none) {
    if (opt_none== true){
  geometry_floor2.visible = false;
  geometry_floor1.visible = true;
  }
    if (opt_none== false){
  geometry_floor1.visible = false;
  geometry_floor2.visible = true;
  }
} );

action_floor_glass.onChange( function (opt_none) {
  geometry_floor2.visible = !opt_none;
  geometry_floor1.visible = opt_none;
} );