Thanks all for the comments. One thing about TG is there never seems to be any indication of a model's scale. In all the renderings I've seen, that one thing stands out. Nothing to indicate just how far one is away from the objects being rendered. I believe this works to TG's advantage.

In Vue, the minute I add a tree or other scale defining object, the scene becomes totally different and loses some of it's intrique. I believe this is akin to 'viewer completion' in drawing, where lines are intentionally left off a drawing so that the viewer can complete the drawing, forcing the viewer to interact with it mentally, which for many creates a greater affinity for the drawing.

Perhaps TG does the same. Without scale, our mind tends to bounce around the scene, searching for something to indicate scale, but never finding anything. We are therefore more mentally involved in the image.

Or perhaps this is all just poppycock.