"The Gi/GR functionality is great if you will be doing a lot of indoor scenes or using Poser figures. If you are basically doing landscapes, those lighting features aren't all that important" Actually, the GI and GR in Vue don't work all that good for interior scenes, but are optimized for outdoor use. They enhance detail in shadowed areas that appear as a single flat color in V4, which works wonders for architecture and vegetation, among other things.