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src/babylon.abstractScene.ts

@@ -138,6 +138,9 @@ module BABYLON {
 
         /**
         * All of the materials added to this scene
+        * In the context a the Scene, it is not supposed to be modified manually.
+        * Any addition or removal should be done using the addMaterial and removeMAterial Scene methods.
+        * Note also that the order of the Material wihin the array is not significant and might change.
         * @see http://doc.babylonjs.com/babylon101/materials
         */
         public materials = new Array<Material>();