I'm fairly new to surfacing and I have a question about singularities created when lofting a surface. I have read in a couple of places that they can cause problems and that's why it's desirable to avoid them and use other methods like fill surface, for instance. However, I've also read about cases when it's OK and they won't be a problem. How can you tell if they will or not be a problem? When is it OK and when isn't? I'm sorry if my question is silly, I'm just a beginner.