灯光

• 点光源

var light = new THREE.PointLight(0xffffff, 1, 100); 
light.position.set(1, 2, 3);
this.scene.add(light);

• 聚光灯

var spotLight = new THREE.SpotLight(0xffffff);
spotLight.castShadow = true; // 点光源
spotLight.position.set(1, 2, 3);
this.scene.add(spotLight);

• 环境光（漫反射）

var ambientLight = new THREE.AmbientLight('#0c0c0c'); ）
this.scene.add(ambientLight);

• 平行光

var directionLight = new THREE.DirectionalLight(0x00FF00, 1);
directionLight.position.set(0, 5, 0);
this.scene.add(directionLight);