Hi is this the latest scene?
Just took a look inside the ball, seems the outer ball is bleeding into the inner ball, wont this cause transperant materials to not look correct? Some part is intersecting while other parts are not intersecting.
Also having 'nothing environment' to reflect is not very good for very shiny materials/chrome etc.
Also it seems very much like the maxwell scene.
Also the bottom is intersecting:
These intersections fit in with whats going on here:
May I modify some things?