diff --git a/src/assets/Res.ts b/src/assets/Res.ts
index 8e2b768c..b60f37ea 100644
--- a/src/assets/Res.ts
+++ b/src/assets/Res.ts
@@ -357,7 +357,7 @@ export class Res {
     /**
      * load texture data from array of web url.
      * make sure there are six images in a group,
-     * and the order is: nx, px, py, ny, nz, pz
+     * and the order is: [+X, -X, +Y, -Y, +Z, -Z]
      * @param urls 
      */
     public async loadTextureCubeMaps(urls: string[]) {
diff --git a/src/textures/BitmapTextureCube.ts b/src/textures/BitmapTextureCube.ts
index d6b254d3..efc43f68 100644
--- a/src/textures/BitmapTextureCube.ts
+++ b/src/textures/BitmapTextureCube.ts
@@ -167,7 +167,7 @@ export class BitmapTextureCube extends TextureCube {
     /**
      * load texture data from array of web url.
      * make sure there are six images in a group,
-     * and the order is: nx, px, py, ny, nz, pz
+     * and the order is: [+X, -X, +Y, -Y, +Z, -Z]
      * @param urls array of image url
      */
     public async load(urls: string[]) {