I was working in 3D coat last night, got to a stopping point, saved and closed. Today when I loaded the file up, my bottom layer is completely grey, all of my painting is gone. The other layers seem to be fine, it's just the bottom most layer that was affected. What could be causing this? It happened before to me when I was using the trial version, closed it to put in the registry key, and then on opening all of my layers were grey or messed up somehow. I thought at the time it was probably just a bug from the file going from a trial to a full version, but now I'm not so sure.
On an unrelated note, but still an issue that is very annoying is that I don't see the nodes that tell me where my points are for the gradient. When I pick 1 and pick 2, the points are put in the world (because they have coordinates) but there's no visual representation of where they are. I only knew there was meant to be nodes because I watched the tutorial, but nothing in the tutorial mentioned (that I heard) a way to toggle these nodes on or off, so I'm not sure where they are.