Like everyone has pointed out, postwork is just a part of the process. If you want to do pure Bryce, thats great, if you want some postwork, then why not. It can also save days of precious rendertime. Especially when using DOF or volumetrics. Instead of days (or weeks) of rendering, these can be added in an hour! I always do postwork of some sort in my pics. Simply because it enhances the quality of the work. One example attached. With and without postwork. Which one is the best...?

Rudolf Herczog
Digital Artist
www.rochr.com