The way I see it, If you can't do better or even Do what he did, you shouldn't be allowed to Judge or Criticize it, Since your Comment is based on what You think is nice.
In Other words, Food critiques Criticize food since they know what is good and what tastes like Crap, So Unless you're a 3D Modeler , you basically have no saying in this, That's why When I post my work I only take Comments that are given by someone who knows his stuff into consideration.