I use smart objects for just about everything. Love them to death, dead useful. However, I've been been having a few problems and have seen a few other posts on the topic here and there so I decided to collect everything I knew into one place. Hope the following is insightful and useful!
Also, I reference a previous post about image distortion using Photoshop's 3D, which you can find here: https://forums.adobe.com/thread/2231734
Thanks for this Vernon. We'll bump it for a day or two to let everyone have a chance to read it.