I’m following the tutorial I found on Alias website for Character Modelling (Character modelling). I know that I can use smooth to make the polygon model become smooth. Once I do that, I can’t go back to the unsmoothed model to edit it, maybe I don’t know how. But it seems that the author of that tutorial can do so, switching between the polygon model and the smoothed model to make fine tunes. How can I do that?