If I open and render the scene as sent with no changes, I get the image attached, and everything looks ok I believe? This is Max 2017, Corona 1.4. All objects are set to be visible when I checked how the scene is set up, with everything listed as a separator being visible. Is this different from your result rendering with the scene as sent? Or is there something I need to change in order to see the problem where the image outside gets cut off?
Thanks!
Tom