function createNormalMateril(){
var cubeMaterialArray = [];
cubeMaterialArray.push( new THREE.MeshBasicMaterial( { color: 0x45beac,transparent:true,opacity:0.5 } ) );
cubeMaterialArray.push( new THREE.MeshBasicMaterial( { color: 0x45beac,transparent:true,opacity:0.6 } ) );
cubeMaterialArray.push( new THREE.MeshBasicMaterial( { color: 0x45beac,transparent:true,opacity:0.7 } ) );
cubeMaterialArray.push( new THREE.MeshBasicMaterial( { color: 0x45beac,transparent:true,opacity:0.7 } ) );
cubeMaterialArray.push( new THREE.MeshBasicMaterial( { color: 0x45beac,transparent:true,opacity:0.4 } ) );
cubeMaterialArray.push( new THREE.MeshBasicMaterial( { color: 0x45beac,transparent:true,opacity:0.5 } ) );
return new THREE.MeshFaceMaterial( cubeMaterialArray );
}