I recreated the tutorial with the same ARDK version and Unity environment, though was not able to recreate your issue. Where were you turning occlusion on/off? It didn’t appear to make a difference on my end. Will you please provide screenshots of your issue along with your menus from Edit > Project Settings> Graphics, as well as Quality settings please? Additionally, please check out this post on URP rendering settings and change the ArdkUrpAsset in each setting to the newly created render asset you created from the tutorial. Please let me know if this helps.
