diff --git a/inc/thorvg.h b/inc/thorvg.h
index 8ac91248..f84ce3e5 100644
--- a/inc/thorvg.h
+++ b/inc/thorvg.h
@@ -454,6 +454,15 @@ public:
      */
     virtual Type type() const noexcept = 0;
 
+    /**
+     * @brief Unique ID of this instance.
+     *
+     * This is reserved to specify an paint instance in a scene.
+     *
+     * @since Experimental API
+     */
+    uint32_t id = 0;
+
     /**
      * @see Paint::type()
      */
diff --git a/src/loaders/lottie/tvgLottieBuilder.cpp b/src/loaders/lottie/tvgLottieBuilder.cpp
index 901c0f37..aea6c5e9 100644
--- a/src/loaders/lottie/tvgLottieBuilder.cpp
+++ b/src/loaders/lottie/tvgLottieBuilder.cpp
@@ -1270,6 +1270,7 @@ static void _updateLayer(LottieComposition* comp, Scene* scene, LottieLayer* lay
 
     //Prepare render data
     layer->scene = Scene::gen().release();
+    layer->scene->id = layer->id;
 
     //ignore opacity when Null layer?
     if (layer->type != LottieLayer::Null) layer->scene->opacity(layer->cache.opacity);