My external drive needed to be erased recently. As I was preparing to do so by backing up files, I found an older version of Photoshop CS6 before the update that turned off 3D on my system. (Thank you God and Time Machine). I reinstalled the older version and re-named it on my desktop. I just have to remember not to double click on a 3D file, launching the 'newer' Photoshop.
|3D is back!|