diff --git a/packages/dev/core/src/Loading/Plugins/babylonFileLoader.ts b/packages/dev/core/src/Loading/Plugins/babylonFileLoader.ts
index 42317e3d095..709e9f9d755 100644
--- a/packages/dev/core/src/Loading/Plugins/babylonFileLoader.ts
+++ b/packages/dev/core/src/Loading/Plugins/babylonFileLoader.ts
@@ -178,7 +178,10 @@ const loadAssetContainer = (scene: Scene, data: string, rootUrl: string, onError
                 }
                 scene.environmentTexture = hdrTexture;
             } else {
-                if ((parsedData.environmentTexture as string).endsWith(".env")) {
+                if (typeof parsedData.environmentTexture === "object") {
+                    const environmentTexture = CubeTexture.Parse(parsedData.environmentTexture, scene, rootUrl);
+                    scene.environmentTexture = environmentTexture;
+                } else if ((parsedData.environmentTexture as string).endsWith(".env")) {
                     const compressedTexture = new CubeTexture(
                         (parsedData.environmentTexture.match(/https?:\/\//g) ? "" : rootUrl) + parsedData.environmentTexture,
                         scene,
diff --git a/packages/dev/core/src/Materials/Textures/cubeTexture.ts b/packages/dev/core/src/Materials/Textures/cubeTexture.ts
index e7c62cd704c..1c22e64fdf6 100644
--- a/packages/dev/core/src/Materials/Textures/cubeTexture.ts
+++ b/packages/dev/core/src/Materials/Textures/cubeTexture.ts
@@ -91,8 +91,9 @@ export class CubeTexture extends BaseTexture {
 
     private _noMipmap: boolean;
 
+    /** @hidden */
     @serialize("files")
-    private _files: Nullable<string[]> = null;
+    public _files: Nullable<string[]> = null;
 
     @serialize("forcedExtension")
     protected _forcedExtension: Nullable<string> = null;
diff --git a/packages/dev/core/src/Misc/sceneSerializer.ts b/packages/dev/core/src/Misc/sceneSerializer.ts
index ec32c42d12d..65c49a41c51 100644
--- a/packages/dev/core/src/Misc/sceneSerializer.ts
+++ b/packages/dev/core/src/Misc/sceneSerializer.ts
@@ -243,8 +243,12 @@ export class SceneSerializer {
 
         // Environment texture
         if (scene.environmentTexture) {
-            serializationObject.environmentTexture = scene.environmentTexture.name;
-            serializationObject.environmentTextureRotationY = (scene.environmentTexture as CubeTexture).rotationY;
+            if ((scene.environmentTexture as CubeTexture)._files) {
+                serializationObject.environmentTexture = scene.environmentTexture.serialize();
+            } else {
+                serializationObject.environmentTexture = scene.environmentTexture.name;
+                serializationObject.environmentTextureRotationY = (scene.environmentTexture as CubeTexture).rotationY;
+            }
         }
 
         // Environment Intensity
diff --git a/packages/dev/materials/readme.md b/packages/dev/materials/readme.md
index d92228c8f6d..58a4ca3beb0 100644
--- a/packages/dev/materials/readme.md
+++ b/packages/dev/materials/readme.md
@@ -1,6 +1,6 @@
 # Materials library
 
-To get a detailed tutorial, please read the [documentation](https://doc.babylonjs.com/how_to/how_to_create_a_material_for_materialslibrary)
+To get a detailed tutorial, please read the [documentation](https://doc.babylonjs.com/divingDeeper/developWithBjs/matForMatLibrary)
 
 For every material, you can find a detailled documentation [here](https://doc.babylonjs.com/extensions) under **materials library** tag.