When I turn off the diffuse map on the 3D Sphere pane in Ensemble8 on Windows the edge of the sphere is smooth and mates with the background perfectly. When I do the same thing on Mac (10.8), the edge of the sphere has a black fringe in places as if the stitching between the polygons of the sphere does not quite match the hole that it is cutting out from the background. It's off by a few pixels in places...