GLTFLoader: Return Group, not Scene.

docs/examples/en/loaders/GLTFLoader.html

@@ -72,8 +72,8 @@
 				scene.add( gltf.scene );
 
 				gltf.animations; // Array<THREE.AnimationClip>
-				gltf.scene; // THREE.Scene
-				gltf.scenes; // Array<THREE.Scene>
+				gltf.scene; // THREE.Group
+				gltf.scenes; // Array<THREE.Group>
 				gltf.cameras; // Array<THREE.Camera>
 				gltf.asset; // Object
 
@@ -199,7 +199,7 @@
 		[page:Function onError] — (optional) A function to be called if an error occurs during parsing. The function receives error as an argument.<br />
 		</p>
 		<p>
-		Parse a glTF-based ArrayBuffer or <em>JSON</em> String and fire [page:Function onLoad] callback when complete. The argument to [page:Function onLoad] will be an [page:object] that contains loaded parts: .[page:Scene scene], .[page:Array scenes], .[page:Array cameras], .[page:Array animations], and .[page:Object asset].
+		Parse a glTF-based ArrayBuffer or <em>JSON</em> String and fire [page:Function onLoad] callback when complete. The argument to [page:Function onLoad] will be an [page:object] that contains loaded parts: .[page:Group scene], .[page:Array scenes], .[page:Array cameras], .[page:Array animations], and .[page:Object asset].
 		</p>
 
 		<h2>Source</h2>

docs/examples/zh/loaders/GLTFLoader.html

@@ -71,8 +71,8 @@
 				scene.add( gltf.scene );
 
 				gltf.animations; // Array<THREE.AnimationClip>
-				gltf.scene; // THREE.Scene
-				gltf.scenes; // Array<THREE.Scene>
+				gltf.scene; // THREE.Group
+				gltf.scenes; // Array<THREE.Group>
 				gltf.cameras; // Array<THREE.Camera>
 				gltf.asset; // Object
 
@@ -124,7 +124,7 @@
 		<h2>自定义扩展</h2>
 
 		<p>
-			来自未知扩展的元数据会被保存到Object3D、Scene和Material实例中上的“.userData.gltfExtensions”，
+			来自未知扩展的元数据会被保存到Object3D、Group和Material实例中上的“.userData.gltfExtensions”，
 			或被附加到 response “gltf”对象。示例：
 		</p>
 
@@ -194,7 +194,7 @@
 		[page:Function onError] — （可选）若在解析过程发生错误，将被调用的函数。该函数接收error来作为参数。<br />
 		</p>
 		<p>
-		解析基于glTF的ArrayBuffer或<em>JSON</em>字符串，并在完成后触发[page:Function onLoad]回调。[page:Function onLoad]的参数将是一个包含有已加载部分的[page:object]：.[page:Scene scene]、 .[page:Array scenes]、 .[page:Array cameras]、 .[page:Array animations] 和 .[page:Object asset]。
+		解析基于glTF的ArrayBuffer或<em>JSON</em>字符串，并在完成后触发[page:Function onLoad]回调。[page:Function onLoad]的参数将是一个包含有已加载部分的[page:object]：.[page:Group scene]、 .[page:Array scenes]、 .[page:Array cameras]、 .[page:Array animations] 和 .[page:Object asset]。
 		</p>
 
 		<h2>源代码</h2>

examples/js/loaders/GLTFLoader.js

@@ -3042,7 +3042,7 @@ THREE.GLTFLoader = ( function () {
 	/**
 	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#scenes
 	 * @param {number} sceneIndex
-	 * @return {Promise<THREE.Scene>}
+	 * @return {Promise<THREE.Group>}
 	 */
 	GLTFParser.prototype.loadScene = function () {
 
@@ -3151,7 +3151,9 @@ THREE.GLTFLoader = ( function () {
 			var sceneDef = this.json.scenes[ sceneIndex ];
 			var parser = this;
 
-			var scene = new THREE.Scene();
+			// Loader returns Group, not Scene.
+			// See: https://github.com/mrdoob/three.js/issues/18342#issuecomment-578981172
+			var scene = new THREE.Group();
 			if ( sceneDef.name ) scene.name = sceneDef.name;
 
 			assignExtrasToUserData( scene, sceneDef );

examples/jsm/loaders/GLTFLoader.js

@@ -55,7 +55,6 @@ import {
 	RGBAFormat,
 	RGBFormat,
 	RepeatWrapping,
-	Scene,
 	Skeleton,
 	SkinnedMesh,
 	Sphere,
@@ -3106,7 +3105,7 @@ var GLTFLoader = ( function () {
 	/**
 	 * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#scenes
 	 * @param {number} sceneIndex
-	 * @return {Promise<Scene>}
+	 * @return {Promise<Group>}
 	 */
 	GLTFParser.prototype.loadScene = function () {
 
@@ -3215,7 +3214,9 @@ var GLTFLoader = ( function () {
 			var sceneDef = this.json.scenes[ sceneIndex ];
 			var parser = this;
 
-			var scene = new Scene();
+			// Loader returns Group, not Scene.
+			// See: https://github.com/mrdoob/three.js/issues/18342#issuecomment-578981172
+			var scene = new Group();
 			if ( sceneDef.name ) scene.name = sceneDef.name;
 
 			assignExtrasToUserData( scene, sceneDef );