Actually one very open contest that allows all kinds of software is held monthly on the Challenge Forum. No restrictions as to postwork or type of software. It's very interesting to see a theme displayed in 2d, 3d, realism and abstract. No software snobbery there...it's often free flowing, creative, and original stuff being posted there. That aside, I think it depends on the point of the contest. If the desire to show the best of the best from an artistic point of view, then that would probably include postwork. (Personally I don't think a postworked staring Vicky is any more artisting that a non-postworked staring Vicky. The art is in originality and creativity...not just in technique.) However, if the point is to improve technique and challenge one's ability to use Poser, whatever version you are using, then there should be no postwork that might mask a poor technical style. I guess it depends on what the community wants overall. As usual, it will be a minority that decides because the majority don't care that much.