Docs: Mentioned the need for ImageBitmap.close().

Author: Mugen87

docs/examples/en/loaders/GLTFLoader.html

@@ -20,6 +20,11 @@ <h1>[name]</h1>
 		textures, skins, skeletons, morph targets, animations, lights, and/or cameras.
 		</p>
 
+		<p>
+			[name] uses [page:ImageBitmapLoader] whenever possible. Please keep in mind that image bitmaps are not automatically GC-collected when they are not referenced anymore.
+			They require a special handling during the disposal process. More information in the [link:http://localhost:8080/docs/index.html#manual/en/introduction/How-to-dispose-of-objects How to dispose of objects] guide.
+		</p>
+
 		<h2>Extensions</h2>
 
 		<p>

docs/examples/zh/loaders/GLTFLoader.html

@@ -19,6 +19,11 @@ <h1>GLTF加载器（[name]）</h1>
 		包括网格、材质、贴图、蒙皮、骨架、变形目标、动画、灯光以及摄像机。
 		</p>
 
+		<p>
+			[name] uses [page:ImageBitmapLoader] whenever possible. Please keep in mind that image bitmaps are not automatically GC-collected when they are not referenced anymore.
+			They require a special handling during the disposal process. More information in the [link:http://localhost:8080/docs/index.html#manual/en/introduction/How-to-dispose-of-objects How to dispose of objects] guide.
+		</p>
+
 		<h2>扩展</h2>
 
 		<p>

docs/manual/en/introduction/How-to-dispose-of-objects.html

@@ -44,6 +44,12 @@ <h2>Textures</h2>
 		Similar to buffers, this object can only be deleted by calling [page:Texture.dispose]().
 	</p>
 
+	<p>
+		If you use an *ImageBitmap* as the texture's data source, you have to call [link:https://developer.mozilla.org/en-US/docs/Web/API/ImageBitmap/close ImageBitmap.close]()
+		on application level to dispose of all CPU-side resources. An automated call of *ImageBitmap.close()* in [page:Texture.dispose]() is not possible since the image bitmap becomes
+		unusable and the engine does not know whether the image bitmap is used elsewhere or not.
+	</p>
+
 	<h2>Render Targets</h2>
 
 	<p>