Quote - When one has no little tree features to be smoothed out I think one should choose no AA at all.

Fact is, it depends. On lots of things. What other objects are in the scene affects significantly how good AA needs to be. Your formula, while maybe good for some TG type scenes, doesn't work well for scenes with foliage close up, or any other objects than mountains, fields and water for that matter.

Also, I've seen cases where a texture looks better anti-aliased as it's too bright and unreal if anti-aliased. So, the material composition also must be taken into consideration. It's a delicate balancing act for sure. Unlike simpler programs, like TG or Podium, with point and click rendering, setting up Vue correctly for photoreal results takes a bit of tinkering with.