I've been modelling a donut with the bells and whistles and run into an issue where the icing of the donut is invisible both in the render and in the rendered viewport. I have a situation of having the base donut with these random floating sprinkles (as the icing is not there).
Here's my file on blend exchange:
I checked that the camera icon was showing like the rest of the objects, checked the layers, the passes etc.
At one point I found an AttributeError in the console talking about "SpaceInfo" and "tree_type" but sadly I could not reproduce the issue to get it to trigger again. I scoured the web to find a similar issue but no one seemed to have what I do, i checked my modifiers on that object to see whether the subsurf was doing something weird but it wasn't, so I leave this up to you. Thanks in advance.