Failed to save - "Can't serialize empty surface"
I just wanted to post my solution to this error that was preventing me from saving in Substance 3D Painter 7.4.3. I had seen several posts saying this is caused by having lost/unallocated textures in the file, but I did not have any. What solved the issue was deleting the default "Layer 1" paint layers that Painter automatically adds to each texture set. I imagine any empty layer could cause this error. It seems incredibly neglectfull that the file defualts that ship with a software are completely preventing user files to be saved in some cases.
Filing a bug report for this as well, but figured it would be useful as a topic here in the meantime.
