message: Document caching behavior of BaseTexture.from
diff: @@ -310,7 +310,9 @@ export default class BaseTexture extends EventEmitter
  /**
  * Helper function that creates a base texture based on the source you provide.
  - * The source can be - image url, image element, canvas element.
  + * The source can be - image url, image element, canvas element. If the
  + * source is an image url or an image element and not in the base texture
  + * cache, it will be created and loaded.
  *
  * @static
  * @param {string|HTMLImageElement|HTMLCanvasElement} source - The source to create base texture from.
  