Invalid:
Replying to antognolli:
This seems to be an issue that happens not only on wayland backends, but on the others too. And it seems to be a problem that the example can't find the path for the image needed for overlay/background.
However, if you install the elementary examples and run it from its installed location, then it should work fine. If you want to try that, build elementary with the --enable-install-examples option.
You can check if the example is reporting any error like "File (or file path) does not exist".
You are absolutely correct... it works fine for me when I run it from the installed executable.