diff --git a/src/examples/PictureJpg.cpp b/src/examples/PictureJpg.cpp
index 7f4e6c5d..0dc6d35c 100644
--- a/src/examples/PictureJpg.cpp
+++ b/src/examples/PictureJpg.cpp
@@ -31,6 +31,8 @@ void tvgDrawCmds(tvg::Canvas* canvas)
 {
     if (!canvas) return;
 
+    auto opacity = 51;
+
     //Load jpg file from path
     for (int i = 0; i < 5; ++i) {
         auto picture = tvg::Picture::gen();
@@ -41,6 +43,7 @@ void tvgDrawCmds(tvg::Canvas* canvas)
         picture->translate(i* 150, i * 150);
         picture->rotate(30 * i);
         picture->size(200, 200);
+        picture->opacity(opacity + opacity * i);
         if (canvas->push(move(picture)) != tvg::Result::Success) return;
     }
 
diff --git a/src/examples/PicturePng.cpp b/src/examples/PicturePng.cpp
index d7ad2081..1cccf696 100644
--- a/src/examples/PicturePng.cpp
+++ b/src/examples/PicturePng.cpp
@@ -32,6 +32,8 @@ void tvgDrawCmds(tvg::Canvas* canvas)
     if (!canvas) return;
 
     //Load png file from path
+    auto opacity = 51;
+
     for (int i = 0; i < 5; ++i) {
         auto picture = tvg::Picture::gen();
         if (picture->load(EXAMPLE_DIR"/test.png") != tvg::Result::Success) {
@@ -41,6 +43,7 @@ void tvgDrawCmds(tvg::Canvas* canvas)
         picture->translate(i* 150, i * 150);
         picture->rotate(30 * i);
         picture->size(200, 200);
+        picture->opacity(opacity + opacity * i);
         if (canvas->push(move(picture)) != tvg::Result::Success) return;
     }